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af1a8899 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 4 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
5 | |
6 | completely rewritten, based on the MD driver code from Marc Zyngier | |
7 | ||
8 | Changes: | |
9 | ||
10 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
11 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
12 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
13 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
14 | - kmod support by: Cyrus Durgin | |
15 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
16 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
17 | ||
18 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
19 | RAID code (such as request based resynchronization): | |
20 | ||
21 | Neil Brown <neilb@cse.unsw.edu.au>. | |
22 | ||
32a7627c N |
23 | - persistent bitmap code |
24 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
25 | ||
9d48739e N |
26 | |
27 | Errors, Warnings, etc. | |
28 | Please use: | |
29 | pr_crit() for error conditions that risk data loss | |
30 | pr_err() for error conditions that are unexpected, like an IO error | |
31 | or internal inconsistency | |
32 | pr_warn() for error conditions that could have been predicated, like | |
33 | adding a device to an array when it has incompatible metadata | |
34 | pr_info() for every interesting, very rare events, like an array starting | |
35 | or stopping, or resync starting or stopping | |
36 | pr_debug() for everything else. | |
37 | ||
1da177e4 LT |
38 | */ |
39 | ||
963c555e | 40 | #include <linux/sched/mm.h> |
3f07c014 | 41 | #include <linux/sched/signal.h> |
a6fb0934 | 42 | #include <linux/kthread.h> |
bff61975 | 43 | #include <linux/blkdev.h> |
fc974ee2 | 44 | #include <linux/badblocks.h> |
1da177e4 | 45 | #include <linux/sysctl.h> |
bff61975 | 46 | #include <linux/seq_file.h> |
ff01bb48 | 47 | #include <linux/fs.h> |
d7603b7e | 48 | #include <linux/poll.h> |
16f17b39 | 49 | #include <linux/ctype.h> |
e7d2860b | 50 | #include <linux/string.h> |
fb4d8c76 N |
51 | #include <linux/hdreg.h> |
52 | #include <linux/proc_fs.h> | |
53 | #include <linux/random.h> | |
056075c7 | 54 | #include <linux/module.h> |
fb4d8c76 | 55 | #include <linux/reboot.h> |
32a7627c | 56 | #include <linux/file.h> |
aa98aa31 | 57 | #include <linux/compat.h> |
25570727 | 58 | #include <linux/delay.h> |
bff61975 N |
59 | #include <linux/raid/md_p.h> |
60 | #include <linux/raid/md_u.h> | |
74cc979c | 61 | #include <linux/raid/detect.h> |
5a0e3ad6 | 62 | #include <linux/slab.h> |
4ad23a97 | 63 | #include <linux/percpu-refcount.h> |
c6a564ff | 64 | #include <linux/part_stat.h> |
4ad23a97 | 65 | |
504634f6 | 66 | #include <trace/events/block.h> |
43b2e5d8 | 67 | #include "md.h" |
935fe098 | 68 | #include "md-bitmap.h" |
edb39c9d | 69 | #include "md-cluster.h" |
1da177e4 | 70 | |
1da177e4 | 71 | #ifndef MODULE |
d710e138 | 72 | static void autostart_arrays(int part); |
1da177e4 LT |
73 | #endif |
74 | ||
01f96c0a N |
75 | /* pers_list is a list of registered personalities protected |
76 | * by pers_lock. | |
77 | * pers_lock does extra service to protect accesses to | |
78 | * mddev->thread when the mutex cannot be held. | |
79 | */ | |
2604b703 | 80 | static LIST_HEAD(pers_list); |
1da177e4 LT |
81 | static DEFINE_SPINLOCK(pers_lock); |
82 | ||
28dec870 KO |
83 | static struct kobj_type md_ktype; |
84 | ||
edb39c9d | 85 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 86 | EXPORT_SYMBOL(md_cluster_ops); |
2b598ee5 | 87 | static struct module *md_cluster_mod; |
edb39c9d | 88 | |
90b08710 | 89 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
90 | static struct workqueue_struct *md_wq; |
91 | static struct workqueue_struct *md_misc_wq; | |
cc1ffe61 | 92 | static struct workqueue_struct *md_rdev_misc_wq; |
90b08710 | 93 | |
746d3207 N |
94 | static int remove_and_add_spares(struct mddev *mddev, |
95 | struct md_rdev *this); | |
5aa61f42 | 96 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 97 | |
1e50915f RB |
98 | /* |
99 | * Default number of read corrections we'll attempt on an rdev | |
100 | * before ejecting it from the array. We divide the read error | |
101 | * count by 2 for every hour elapsed between read errors. | |
102 | */ | |
103 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
1da177e4 LT |
104 | /* |
105 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
106 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
107 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 108 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
109 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
110 | * speed limit - in case reconstruction slows down your system despite | |
111 | * idle IO detection. | |
112 | * | |
113 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 114 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
115 | */ |
116 | ||
117 | static int sysctl_speed_limit_min = 1000; | |
118 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 119 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
120 | { |
121 | return mddev->sync_speed_min ? | |
122 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
123 | } | |
124 | ||
fd01b88c | 125 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
126 | { |
127 | return mddev->sync_speed_max ? | |
128 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
129 | } | |
1da177e4 | 130 | |
69b00b5b GJ |
131 | static void rdev_uninit_serial(struct md_rdev *rdev) |
132 | { | |
133 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) | |
134 | return; | |
135 | ||
025471f9 | 136 | kvfree(rdev->serial); |
69b00b5b GJ |
137 | rdev->serial = NULL; |
138 | } | |
139 | ||
140 | static void rdevs_uninit_serial(struct mddev *mddev) | |
141 | { | |
142 | struct md_rdev *rdev; | |
143 | ||
144 | rdev_for_each(rdev, mddev) | |
145 | rdev_uninit_serial(rdev); | |
146 | } | |
147 | ||
404659cf | 148 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 | 149 | { |
025471f9 GJ |
150 | /* serial_nums equals with BARRIER_BUCKETS_NR */ |
151 | int i, serial_nums = 1 << ((PAGE_SHIFT - ilog2(sizeof(atomic_t)))); | |
69b00b5b GJ |
152 | struct serial_in_rdev *serial = NULL; |
153 | ||
154 | if (test_bit(CollisionCheck, &rdev->flags)) | |
155 | return 0; | |
156 | ||
025471f9 GJ |
157 | serial = kvmalloc(sizeof(struct serial_in_rdev) * serial_nums, |
158 | GFP_KERNEL); | |
69b00b5b GJ |
159 | if (!serial) |
160 | return -ENOMEM; | |
161 | ||
025471f9 GJ |
162 | for (i = 0; i < serial_nums; i++) { |
163 | struct serial_in_rdev *serial_tmp = &serial[i]; | |
164 | ||
165 | spin_lock_init(&serial_tmp->serial_lock); | |
166 | serial_tmp->serial_rb = RB_ROOT_CACHED; | |
167 | init_waitqueue_head(&serial_tmp->serial_io_wait); | |
168 | } | |
169 | ||
69b00b5b | 170 | rdev->serial = serial; |
404659cf | 171 | set_bit(CollisionCheck, &rdev->flags); |
3e148a32 | 172 | |
69b00b5b | 173 | return 0; |
3e148a32 GJ |
174 | } |
175 | ||
69b00b5b | 176 | static int rdevs_init_serial(struct mddev *mddev) |
11d3a9f6 GJ |
177 | { |
178 | struct md_rdev *rdev; | |
69b00b5b | 179 | int ret = 0; |
11d3a9f6 GJ |
180 | |
181 | rdev_for_each(rdev, mddev) { | |
69b00b5b GJ |
182 | ret = rdev_init_serial(rdev); |
183 | if (ret) | |
184 | break; | |
11d3a9f6 | 185 | } |
69b00b5b GJ |
186 | |
187 | /* Free all resources if pool is not existed */ | |
188 | if (ret && !mddev->serial_info_pool) | |
189 | rdevs_uninit_serial(mddev); | |
190 | ||
191 | return ret; | |
11d3a9f6 GJ |
192 | } |
193 | ||
963c555e | 194 | /* |
de31ee94 GJ |
195 | * rdev needs to enable serial stuffs if it meets the conditions: |
196 | * 1. it is multi-queue device flaged with writemostly. | |
197 | * 2. the write-behind mode is enabled. | |
198 | */ | |
199 | static int rdev_need_serial(struct md_rdev *rdev) | |
200 | { | |
201 | return (rdev && rdev->mddev->bitmap_info.max_write_behind > 0 && | |
e556f6ba | 202 | rdev->bdev->bd_disk->queue->nr_hw_queues != 1 && |
de31ee94 GJ |
203 | test_bit(WriteMostly, &rdev->flags)); |
204 | } | |
205 | ||
206 | /* | |
207 | * Init resource for rdev(s), then create serial_info_pool if: | |
208 | * 1. rdev is the first device which return true from rdev_enable_serial. | |
209 | * 2. rdev is NULL, means we want to enable serialization for all rdevs. | |
963c555e | 210 | */ |
404659cf | 211 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
11d3a9f6 | 212 | bool is_suspend) |
963c555e | 213 | { |
69b00b5b GJ |
214 | int ret = 0; |
215 | ||
de31ee94 GJ |
216 | if (rdev && !rdev_need_serial(rdev) && |
217 | !test_bit(CollisionCheck, &rdev->flags)) | |
963c555e GJ |
218 | return; |
219 | ||
de31ee94 GJ |
220 | if (!is_suspend) |
221 | mddev_suspend(mddev); | |
222 | ||
223 | if (!rdev) | |
69b00b5b | 224 | ret = rdevs_init_serial(mddev); |
de31ee94 | 225 | else |
69b00b5b GJ |
226 | ret = rdev_init_serial(rdev); |
227 | if (ret) | |
228 | goto abort; | |
de31ee94 | 229 | |
404659cf | 230 | if (mddev->serial_info_pool == NULL) { |
3024ba2d CL |
231 | /* |
232 | * already in memalloc noio context by | |
233 | * mddev_suspend() | |
234 | */ | |
404659cf GJ |
235 | mddev->serial_info_pool = |
236 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
237 | sizeof(struct serial_info)); | |
69b00b5b GJ |
238 | if (!mddev->serial_info_pool) { |
239 | rdevs_uninit_serial(mddev); | |
404659cf | 240 | pr_err("can't alloc memory pool for serialization\n"); |
69b00b5b | 241 | } |
963c555e | 242 | } |
69b00b5b GJ |
243 | |
244 | abort: | |
de31ee94 GJ |
245 | if (!is_suspend) |
246 | mddev_resume(mddev); | |
963c555e | 247 | } |
963c555e GJ |
248 | |
249 | /* | |
de31ee94 GJ |
250 | * Free resource from rdev(s), and destroy serial_info_pool under conditions: |
251 | * 1. rdev is the last device flaged with CollisionCheck. | |
252 | * 2. when bitmap is destroyed while policy is not enabled. | |
253 | * 3. for disable policy, the pool is destroyed only when no rdev needs it. | |
963c555e | 254 | */ |
69b00b5b GJ |
255 | void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
256 | bool is_suspend) | |
963c555e | 257 | { |
11d3a9f6 | 258 | if (rdev && !test_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
259 | return; |
260 | ||
404659cf | 261 | if (mddev->serial_info_pool) { |
963c555e | 262 | struct md_rdev *temp; |
de31ee94 | 263 | int num = 0; /* used to track if other rdevs need the pool */ |
963c555e | 264 | |
11d3a9f6 GJ |
265 | if (!is_suspend) |
266 | mddev_suspend(mddev); | |
267 | rdev_for_each(temp, mddev) { | |
268 | if (!rdev) { | |
69b00b5b GJ |
269 | if (!mddev->serialize_policy || |
270 | !rdev_need_serial(temp)) | |
271 | rdev_uninit_serial(temp); | |
de31ee94 GJ |
272 | else |
273 | num++; | |
274 | } else if (temp != rdev && | |
275 | test_bit(CollisionCheck, &temp->flags)) | |
963c555e | 276 | num++; |
11d3a9f6 GJ |
277 | } |
278 | ||
279 | if (rdev) | |
69b00b5b | 280 | rdev_uninit_serial(rdev); |
de31ee94 GJ |
281 | |
282 | if (num) | |
283 | pr_info("The mempool could be used by other devices\n"); | |
284 | else { | |
404659cf GJ |
285 | mempool_destroy(mddev->serial_info_pool); |
286 | mddev->serial_info_pool = NULL; | |
963c555e | 287 | } |
11d3a9f6 GJ |
288 | if (!is_suspend) |
289 | mddev_resume(mddev); | |
963c555e GJ |
290 | } |
291 | } | |
292 | ||
1da177e4 LT |
293 | static struct ctl_table_header *raid_table_header; |
294 | ||
82592c38 | 295 | static struct ctl_table raid_table[] = { |
1da177e4 | 296 | { |
1da177e4 LT |
297 | .procname = "speed_limit_min", |
298 | .data = &sysctl_speed_limit_min, | |
299 | .maxlen = sizeof(int), | |
80ca3a44 | 300 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 301 | .proc_handler = proc_dointvec, |
1da177e4 LT |
302 | }, |
303 | { | |
1da177e4 LT |
304 | .procname = "speed_limit_max", |
305 | .data = &sysctl_speed_limit_max, | |
306 | .maxlen = sizeof(int), | |
80ca3a44 | 307 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 308 | .proc_handler = proc_dointvec, |
1da177e4 | 309 | }, |
894d2491 | 310 | { } |
1da177e4 LT |
311 | }; |
312 | ||
82592c38 | 313 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 314 | { |
1da177e4 LT |
315 | .procname = "raid", |
316 | .maxlen = 0, | |
80ca3a44 | 317 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
318 | .child = raid_table, |
319 | }, | |
894d2491 | 320 | { } |
1da177e4 LT |
321 | }; |
322 | ||
82592c38 | 323 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 324 | { |
1da177e4 LT |
325 | .procname = "dev", |
326 | .maxlen = 0, | |
327 | .mode = 0555, | |
328 | .child = raid_dir_table, | |
329 | }, | |
894d2491 | 330 | { } |
1da177e4 LT |
331 | }; |
332 | ||
83d5cde4 | 333 | static const struct block_device_operations md_fops; |
1da177e4 | 334 | |
f91de92e N |
335 | static int start_readonly; |
336 | ||
78b6350d N |
337 | /* |
338 | * The original mechanism for creating an md device is to create | |
339 | * a device node in /dev and to open it. This causes races with device-close. | |
340 | * The preferred method is to write to the "new_array" module parameter. | |
341 | * This can avoid races. | |
342 | * Setting create_on_open to false disables the original mechanism | |
343 | * so all the races disappear. | |
344 | */ | |
345 | static bool create_on_open = true; | |
346 | ||
a167f663 | 347 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 348 | struct mddev *mddev) |
a167f663 | 349 | { |
afeee514 | 350 | if (!mddev || !bioset_initialized(&mddev->bio_set)) |
a167f663 N |
351 | return bio_alloc(gfp_mask, nr_iovecs); |
352 | ||
6251691a | 353 | return bio_alloc_bioset(gfp_mask, nr_iovecs, &mddev->bio_set); |
a167f663 N |
354 | } |
355 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
356 | ||
5a85071c N |
357 | static struct bio *md_bio_alloc_sync(struct mddev *mddev) |
358 | { | |
afeee514 | 359 | if (!mddev || !bioset_initialized(&mddev->sync_set)) |
5a85071c N |
360 | return bio_alloc(GFP_NOIO, 1); |
361 | ||
afeee514 | 362 | return bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
5a85071c N |
363 | } |
364 | ||
d7603b7e N |
365 | /* |
366 | * We have a system wide 'event count' that is incremented | |
367 | * on any 'interesting' event, and readers of /proc/mdstat | |
368 | * can use 'poll' or 'select' to find out when the event | |
369 | * count increases. | |
370 | * | |
371 | * Events are: | |
372 | * start array, stop array, error, add device, remove device, | |
373 | * start build, activate spare | |
374 | */ | |
2989ddbd | 375 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 376 | static atomic_t md_event_count; |
fd01b88c | 377 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
378 | { |
379 | atomic_inc(&md_event_count); | |
380 | wake_up(&md_event_waiters); | |
381 | } | |
29269553 | 382 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 383 | |
1da177e4 LT |
384 | /* |
385 | * Enables to iterate over all existing md arrays | |
386 | * all_mddevs_lock protects this list. | |
387 | */ | |
388 | static LIST_HEAD(all_mddevs); | |
389 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
390 | ||
1da177e4 LT |
391 | /* |
392 | * iterates through all used mddevs in the system. | |
393 | * We take care to grab the all_mddevs_lock whenever navigating | |
394 | * the list, and to always hold a refcount when unlocked. | |
395 | * Any code which breaks out of this loop while own | |
396 | * a reference to the current mddev and must mddev_put it. | |
397 | */ | |
fd01b88c | 398 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 399 | \ |
f72ffdd6 | 400 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
401 | _tmp = all_mddevs.next; \ |
402 | _mddev = NULL;}); \ | |
403 | ({ if (_tmp != &all_mddevs) \ | |
404 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 405 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
406 | if (_mddev) mddev_put(_mddev); \ |
407 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
408 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 409 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 410 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
411 | ) |
412 | ||
409c57f3 N |
413 | /* Rather than calling directly into the personality make_request function, |
414 | * IO requests come here first so that we can check if the device is | |
415 | * being suspended pending a reconfiguration. | |
416 | * We hold a refcount over the call to ->make_request. By the time that | |
417 | * call has finished, the bio has been linked into some internal structure | |
418 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
419 | */ | |
b3143b9a N |
420 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
421 | { | |
422 | if (mddev->suspended) | |
423 | return true; | |
424 | if (bio_data_dir(bio) != WRITE) | |
425 | return false; | |
426 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
427 | return false; | |
428 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
429 | return false; | |
430 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
431 | return false; | |
432 | return true; | |
433 | } | |
434 | ||
393debc2 SL |
435 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
436 | { | |
437 | check_suspended: | |
438 | rcu_read_lock(); | |
b3143b9a | 439 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
440 | DEFINE_WAIT(__wait); |
441 | for (;;) { | |
442 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
443 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 444 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
445 | break; |
446 | rcu_read_unlock(); | |
447 | schedule(); | |
448 | rcu_read_lock(); | |
449 | } | |
450 | finish_wait(&mddev->sb_wait, &__wait); | |
451 | } | |
452 | atomic_inc(&mddev->active_io); | |
453 | rcu_read_unlock(); | |
454 | ||
455 | if (!mddev->pers->make_request(mddev, bio)) { | |
456 | atomic_dec(&mddev->active_io); | |
457 | wake_up(&mddev->sb_wait); | |
458 | goto check_suspended; | |
459 | } | |
460 | ||
461 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
462 | wake_up(&mddev->sb_wait); | |
463 | } | |
464 | EXPORT_SYMBOL(md_handle_request); | |
465 | ||
41d2d848 AP |
466 | struct md_io { |
467 | struct mddev *mddev; | |
468 | bio_end_io_t *orig_bi_end_io; | |
469 | void *orig_bi_private; | |
470 | unsigned long start_time; | |
471 | }; | |
472 | ||
473 | static void md_end_io(struct bio *bio) | |
474 | { | |
475 | struct md_io *md_io = bio->bi_private; | |
476 | struct mddev *mddev = md_io->mddev; | |
477 | ||
478 | disk_end_io_acct(mddev->gendisk, bio_op(bio), md_io->start_time); | |
479 | ||
480 | bio->bi_end_io = md_io->orig_bi_end_io; | |
481 | bio->bi_private = md_io->orig_bi_private; | |
482 | ||
483 | mempool_free(md_io, &mddev->md_io_pool); | |
484 | ||
485 | if (bio->bi_end_io) | |
486 | bio->bi_end_io(bio); | |
487 | } | |
488 | ||
c62b37d9 | 489 | static blk_qc_t md_submit_bio(struct bio *bio) |
1da177e4 | 490 | { |
49077326 | 491 | const int rw = bio_data_dir(bio); |
e4fc5a74 | 492 | struct mddev *mddev = bio->bi_disk->private_data; |
49077326 | 493 | |
9a5a8597 | 494 | if (mddev == NULL || mddev->pers == NULL) { |
62f7b198 GP |
495 | bio_io_error(bio); |
496 | return BLK_QC_T_NONE; | |
497 | } | |
498 | ||
9a5a8597 | 499 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
409c57f3 | 500 | bio_io_error(bio); |
dece1635 | 501 | return BLK_QC_T_NONE; |
409c57f3 | 502 | } |
9a5a8597 CIK |
503 | |
504 | blk_queue_split(&bio); | |
505 | ||
bbfa57c0 | 506 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 507 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 508 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 509 | bio_endio(bio); |
dece1635 | 510 | return BLK_QC_T_NONE; |
bbfa57c0 | 511 | } |
49077326 | 512 | |
41d2d848 AP |
513 | if (bio->bi_end_io != md_end_io) { |
514 | struct md_io *md_io; | |
515 | ||
516 | md_io = mempool_alloc(&mddev->md_io_pool, GFP_NOIO); | |
517 | md_io->mddev = mddev; | |
518 | md_io->orig_bi_end_io = bio->bi_end_io; | |
519 | md_io->orig_bi_private = bio->bi_private; | |
520 | ||
521 | bio->bi_end_io = md_end_io; | |
522 | bio->bi_private = md_io; | |
523 | ||
524 | md_io->start_time = disk_start_io_acct(mddev->gendisk, | |
525 | bio_sectors(bio), | |
526 | bio_op(bio)); | |
527 | } | |
528 | ||
9c573de3 | 529 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 530 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
531 | |
532 | md_handle_request(mddev, bio); | |
49077326 | 533 | |
dece1635 | 534 | return BLK_QC_T_NONE; |
409c57f3 N |
535 | } |
536 | ||
9e35b99c N |
537 | /* mddev_suspend makes sure no new requests are submitted |
538 | * to the device, and that any requests that have been submitted | |
539 | * are completely handled. | |
afa0f557 N |
540 | * Once mddev_detach() is called and completes, the module will be |
541 | * completely unused. | |
9e35b99c | 542 | */ |
fd01b88c | 543 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 544 | { |
092398dc | 545 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 546 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
547 | if (mddev->suspended++) |
548 | return; | |
409c57f3 | 549 | synchronize_rcu(); |
cc27b0c7 | 550 | wake_up(&mddev->sb_wait); |
35bfc521 N |
551 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
552 | smp_mb__after_atomic(); | |
409c57f3 N |
553 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
554 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
555 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
556 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
557 | |
558 | del_timer_sync(&mddev->safemode_timer); | |
78f57ef9 CL |
559 | /* restrict memory reclaim I/O during raid array is suspend */ |
560 | mddev->noio_flag = memalloc_noio_save(); | |
409c57f3 | 561 | } |
390ee602 | 562 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 563 | |
fd01b88c | 564 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 565 | { |
78f57ef9 CL |
566 | /* entred the memalloc scope from mddev_suspend() */ |
567 | memalloc_noio_restore(mddev->noio_flag); | |
4d5324f7 | 568 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
569 | if (--mddev->suspended) |
570 | return; | |
409c57f3 N |
571 | wake_up(&mddev->sb_wait); |
572 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 573 | |
47525e59 | 574 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
575 | md_wakeup_thread(mddev->thread); |
576 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 577 | } |
390ee602 | 578 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 579 | |
fd01b88c | 580 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 581 | { |
5c675f83 N |
582 | struct md_personality *pers = mddev->pers; |
583 | int ret = 0; | |
584 | ||
585 | rcu_read_lock(); | |
586 | if (mddev->suspended) | |
587 | ret = 1; | |
588 | else if (pers && pers->congested) | |
589 | ret = pers->congested(mddev, bits); | |
590 | rcu_read_unlock(); | |
591 | return ret; | |
592 | } | |
593 | EXPORT_SYMBOL_GPL(mddev_congested); | |
594 | static int md_congested(void *data, int bits) | |
595 | { | |
596 | struct mddev *mddev = data; | |
597 | return mddev_congested(mddev, bits); | |
3fa841d7 | 598 | } |
3fa841d7 | 599 | |
a2826aa9 | 600 | /* |
e9c7469b | 601 | * Generic flush handling for md |
a2826aa9 N |
602 | */ |
603 | ||
4bc034d3 | 604 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 605 | { |
4bc034d3 N |
606 | struct md_rdev *rdev = bio->bi_private; |
607 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
608 | |
609 | rdev_dec_pending(rdev, mddev); | |
610 | ||
4bc034d3 N |
611 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
612 | /* The pre-request flush has finished */ | |
613 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 614 | } |
4bc034d3 | 615 | bio_put(bio); |
5a409b4f | 616 | } |
a7a07e69 | 617 | |
4bc034d3 N |
618 | static void md_submit_flush_data(struct work_struct *ws); |
619 | ||
620 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 621 | { |
4bc034d3 | 622 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 623 | struct md_rdev *rdev; |
a2826aa9 | 624 | |
2bc13b83 | 625 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
626 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
627 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 628 | rcu_read_lock(); |
dafb20fa | 629 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
630 | if (rdev->raid_disk >= 0 && |
631 | !test_bit(Faulty, &rdev->flags)) { | |
632 | /* Take two references, one is dropped | |
633 | * when request finishes, one after | |
634 | * we reclaim rcu_read_lock | |
635 | */ | |
636 | struct bio *bi; | |
637 | atomic_inc(&rdev->nr_pending); | |
638 | atomic_inc(&rdev->nr_pending); | |
639 | rcu_read_unlock(); | |
b5e1b8ce | 640 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
5a409b4f | 641 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
642 | bi->bi_private = rdev; |
643 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 644 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 645 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 646 | submit_bio(bi); |
a2826aa9 N |
647 | rcu_read_lock(); |
648 | rdev_dec_pending(rdev, mddev); | |
649 | } | |
650 | rcu_read_unlock(); | |
4bc034d3 N |
651 | if (atomic_dec_and_test(&mddev->flush_pending)) |
652 | queue_work(md_wq, &mddev->flush_work); | |
653 | } | |
a2826aa9 | 654 | |
4bc034d3 N |
655 | static void md_submit_flush_data(struct work_struct *ws) |
656 | { | |
657 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
658 | struct bio *bio = mddev->flush_bio; | |
659 | ||
660 | /* | |
661 | * must reset flush_bio before calling into md_handle_request to avoid a | |
662 | * deadlock, because other bios passed md_handle_request suspend check | |
663 | * could wait for this and below md_handle_request could wait for those | |
664 | * bios because of suspend check | |
665 | */ | |
2bc13b83 | 666 | mddev->last_flush = mddev->start_flush; |
4bc034d3 N |
667 | mddev->flush_bio = NULL; |
668 | wake_up(&mddev->sb_wait); | |
669 | ||
670 | if (bio->bi_iter.bi_size == 0) { | |
671 | /* an empty barrier - all done */ | |
672 | bio_endio(bio); | |
673 | } else { | |
674 | bio->bi_opf &= ~REQ_PREFLUSH; | |
675 | md_handle_request(mddev, bio); | |
a2826aa9 | 676 | } |
a2826aa9 | 677 | } |
4bc034d3 | 678 | |
775d7831 DJ |
679 | /* |
680 | * Manages consolidation of flushes and submitting any flushes needed for | |
681 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
682 | * being finished in another context. Returns false if the flushing is | |
683 | * complete but still needs the I/O portion of the bio to be processed. | |
684 | */ | |
685 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 686 | { |
2bc13b83 | 687 | ktime_t start = ktime_get_boottime(); |
4bc034d3 N |
688 | spin_lock_irq(&mddev->lock); |
689 | wait_event_lock_irq(mddev->sb_wait, | |
2bc13b83 N |
690 | !mddev->flush_bio || |
691 | ktime_after(mddev->last_flush, start), | |
4bc034d3 | 692 | mddev->lock); |
2bc13b83 N |
693 | if (!ktime_after(mddev->last_flush, start)) { |
694 | WARN_ON(mddev->flush_bio); | |
695 | mddev->flush_bio = bio; | |
696 | bio = NULL; | |
697 | } | |
4bc034d3 N |
698 | spin_unlock_irq(&mddev->lock); |
699 | ||
2bc13b83 N |
700 | if (!bio) { |
701 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
702 | queue_work(md_wq, &mddev->flush_work); | |
703 | } else { | |
704 | /* flush was performed for some other bio while we waited. */ | |
705 | if (bio->bi_iter.bi_size == 0) | |
706 | /* an empty barrier - all done */ | |
707 | bio_endio(bio); | |
708 | else { | |
709 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 710 | return false; |
2bc13b83 N |
711 | } |
712 | } | |
775d7831 | 713 | return true; |
4bc034d3 | 714 | } |
e9c7469b | 715 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 716 | |
fd01b88c | 717 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
718 | { |
719 | atomic_inc(&mddev->active); | |
720 | return mddev; | |
721 | } | |
722 | ||
5fd3a17e | 723 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 724 | |
fd01b88c | 725 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
726 | { |
727 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
728 | return; | |
d3374825 | 729 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
730 | mddev->ctime == 0 && !mddev->hold_active) { |
731 | /* Array is not configured at all, and not held active, | |
732 | * so destroy it */ | |
af8a2434 | 733 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
734 | |
735 | /* | |
736 | * Call queue_work inside the spinlock so that | |
737 | * flush_workqueue() after mddev_find will succeed in waiting | |
738 | * for the work to be done. | |
739 | */ | |
740 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
741 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
742 | } |
743 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
744 | } |
745 | ||
8376d3c1 | 746 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 747 | |
fd01b88c | 748 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 749 | { |
28dec870 | 750 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
751 | mutex_init(&mddev->open_mutex); |
752 | mutex_init(&mddev->reconfig_mutex); | |
753 | mutex_init(&mddev->bitmap_info.mutex); | |
754 | INIT_LIST_HEAD(&mddev->disks); | |
755 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 756 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
757 | atomic_set(&mddev->active, 1); |
758 | atomic_set(&mddev->openers, 0); | |
759 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 760 | spin_lock_init(&mddev->lock); |
4bc034d3 | 761 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
762 | init_waitqueue_head(&mddev->sb_wait); |
763 | init_waitqueue_head(&mddev->recovery_wait); | |
764 | mddev->reshape_position = MaxSector; | |
2c810cdd | 765 | mddev->reshape_backwards = 0; |
c4a39551 | 766 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
767 | mddev->resync_min = 0; |
768 | mddev->resync_max = MaxSector; | |
769 | mddev->level = LEVEL_NONE; | |
770 | } | |
390ee602 | 771 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 772 | |
f72ffdd6 | 773 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 774 | { |
fd01b88c | 775 | struct mddev *mddev, *new = NULL; |
1da177e4 | 776 | |
8f5f02c4 N |
777 | if (unit && MAJOR(unit) != MD_MAJOR) |
778 | unit &= ~((1<<MdpMinorShift)-1); | |
779 | ||
1da177e4 LT |
780 | retry: |
781 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
782 | |
783 | if (unit) { | |
784 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
785 | if (mddev->unit == unit) { | |
786 | mddev_get(mddev); | |
787 | spin_unlock(&all_mddevs_lock); | |
788 | kfree(new); | |
789 | return mddev; | |
790 | } | |
791 | ||
792 | if (new) { | |
793 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 794 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
795 | new->hold_active = UNTIL_IOCTL; |
796 | return new; | |
1da177e4 | 797 | } |
efeb53c0 N |
798 | } else if (new) { |
799 | /* find an unused unit number */ | |
800 | static int next_minor = 512; | |
801 | int start = next_minor; | |
802 | int is_free = 0; | |
803 | int dev = 0; | |
804 | while (!is_free) { | |
805 | dev = MKDEV(MD_MAJOR, next_minor); | |
806 | next_minor++; | |
807 | if (next_minor > MINORMASK) | |
808 | next_minor = 0; | |
809 | if (next_minor == start) { | |
810 | /* Oh dear, all in use. */ | |
811 | spin_unlock(&all_mddevs_lock); | |
812 | kfree(new); | |
813 | return NULL; | |
814 | } | |
f72ffdd6 | 815 | |
efeb53c0 N |
816 | is_free = 1; |
817 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
818 | if (mddev->unit == dev) { | |
819 | is_free = 0; | |
820 | break; | |
821 | } | |
822 | } | |
823 | new->unit = dev; | |
824 | new->md_minor = MINOR(dev); | |
825 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
826 | list_add(&new->all_mddevs, &all_mddevs); |
827 | spin_unlock(&all_mddevs_lock); | |
828 | return new; | |
829 | } | |
830 | spin_unlock(&all_mddevs_lock); | |
831 | ||
9ffae0cf | 832 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
833 | if (!new) |
834 | return NULL; | |
835 | ||
1da177e4 LT |
836 | new->unit = unit; |
837 | if (MAJOR(unit) == MD_MAJOR) | |
838 | new->md_minor = MINOR(unit); | |
839 | else | |
840 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
841 | ||
fafd7fb0 | 842 | mddev_init(new); |
1da177e4 | 843 | |
1da177e4 LT |
844 | goto retry; |
845 | } | |
846 | ||
b6eb127d N |
847 | static struct attribute_group md_redundancy_group; |
848 | ||
5c47daf6 | 849 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 850 | { |
a64c876f | 851 | if (mddev->to_remove) { |
b6eb127d N |
852 | /* These cannot be removed under reconfig_mutex as |
853 | * an access to the files will try to take reconfig_mutex | |
854 | * while holding the file unremovable, which leads to | |
855 | * a deadlock. | |
bb4f1e9d N |
856 | * So hold set sysfs_active while the remove in happeing, |
857 | * and anything else which might set ->to_remove or my | |
858 | * otherwise change the sysfs namespace will fail with | |
859 | * -EBUSY if sysfs_active is still set. | |
860 | * We set sysfs_active under reconfig_mutex and elsewhere | |
861 | * test it under the same mutex to ensure its correct value | |
862 | * is seen. | |
b6eb127d | 863 | */ |
a64c876f N |
864 | struct attribute_group *to_remove = mddev->to_remove; |
865 | mddev->to_remove = NULL; | |
bb4f1e9d | 866 | mddev->sysfs_active = 1; |
b6eb127d N |
867 | mutex_unlock(&mddev->reconfig_mutex); |
868 | ||
00bcb4ac N |
869 | if (mddev->kobj.sd) { |
870 | if (to_remove != &md_redundancy_group) | |
871 | sysfs_remove_group(&mddev->kobj, to_remove); | |
872 | if (mddev->pers == NULL || | |
873 | mddev->pers->sync_request == NULL) { | |
874 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
875 | if (mddev->sysfs_action) | |
876 | sysfs_put(mddev->sysfs_action); | |
877 | mddev->sysfs_action = NULL; | |
878 | } | |
a64c876f | 879 | } |
bb4f1e9d | 880 | mddev->sysfs_active = 0; |
b6eb127d N |
881 | } else |
882 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 883 | |
751e67ca CD |
884 | /* As we've dropped the mutex we need a spinlock to |
885 | * make sure the thread doesn't disappear | |
01f96c0a N |
886 | */ |
887 | spin_lock(&pers_lock); | |
005eca5e | 888 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 889 | wake_up(&mddev->sb_wait); |
01f96c0a | 890 | spin_unlock(&pers_lock); |
1da177e4 | 891 | } |
5c47daf6 | 892 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 893 | |
57d051dc | 894 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
895 | { |
896 | struct md_rdev *rdev; | |
897 | ||
898 | rdev_for_each_rcu(rdev, mddev) | |
899 | if (rdev->desc_nr == nr) | |
900 | return rdev; | |
901 | ||
902 | return NULL; | |
903 | } | |
57d051dc | 904 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
905 | |
906 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 907 | { |
3cb03002 | 908 | struct md_rdev *rdev; |
1da177e4 | 909 | |
dafb20fa | 910 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
911 | if (rdev->bdev->bd_dev == dev) |
912 | return rdev; | |
159ec1fc | 913 | |
1da177e4 LT |
914 | return NULL; |
915 | } | |
916 | ||
1532d9e8 | 917 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
918 | { |
919 | struct md_rdev *rdev; | |
920 | ||
921 | rdev_for_each_rcu(rdev, mddev) | |
922 | if (rdev->bdev->bd_dev == dev) | |
923 | return rdev; | |
924 | ||
925 | return NULL; | |
926 | } | |
1532d9e8 | 927 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 928 | |
84fc4b56 | 929 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 930 | { |
84fc4b56 | 931 | struct md_personality *pers; |
d9d166c2 N |
932 | list_for_each_entry(pers, &pers_list, list) { |
933 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 934 | return pers; |
d9d166c2 N |
935 | if (strcmp(pers->name, clevel)==0) |
936 | return pers; | |
937 | } | |
2604b703 N |
938 | return NULL; |
939 | } | |
940 | ||
b73df2d3 | 941 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 942 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 943 | { |
57b2caa3 | 944 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 945 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
946 | } |
947 | ||
f72ffdd6 | 948 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 949 | { |
1da177e4 | 950 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 951 | if (!rdev->sb_page) |
ebc24337 | 952 | return -ENOMEM; |
1da177e4 LT |
953 | return 0; |
954 | } | |
955 | ||
545c8795 | 956 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
957 | { |
958 | if (rdev->sb_page) { | |
2d1f3b5d | 959 | put_page(rdev->sb_page); |
1da177e4 LT |
960 | rdev->sb_loaded = 0; |
961 | rdev->sb_page = NULL; | |
0f420358 | 962 | rdev->sb_start = 0; |
dd8ac336 | 963 | rdev->sectors = 0; |
1da177e4 | 964 | } |
2699b672 N |
965 | if (rdev->bb_page) { |
966 | put_page(rdev->bb_page); | |
967 | rdev->bb_page = NULL; | |
968 | } | |
d3b407fb | 969 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 970 | } |
545c8795 | 971 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 972 | |
4246a0b6 | 973 | static void super_written(struct bio *bio) |
7bfa19f2 | 974 | { |
3cb03002 | 975 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 976 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 977 | |
4e4cbee9 CH |
978 | if (bio->bi_status) { |
979 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 980 | md_error(mddev, rdev); |
46533ff7 N |
981 | if (!test_bit(Faulty, &rdev->flags) |
982 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 983 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
984 | set_bit(LastDev, &rdev->flags); |
985 | } | |
986 | } else | |
987 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 988 | |
a9701a30 N |
989 | if (atomic_dec_and_test(&mddev->pending_writes)) |
990 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 991 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 992 | bio_put(bio); |
7bfa19f2 N |
993 | } |
994 | ||
fd01b88c | 995 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
996 | sector_t sector, int size, struct page *page) |
997 | { | |
998 | /* write first size bytes of page to sector of rdev | |
999 | * Increment mddev->pending_writes before returning | |
1000 | * and decrement it on completion, waking up sb_wait | |
1001 | * if zero is reached. | |
1002 | * If an error occurred, call md_error | |
1003 | */ | |
46533ff7 N |
1004 | struct bio *bio; |
1005 | int ff = 0; | |
1006 | ||
4b6c1060 HM |
1007 | if (!page) |
1008 | return; | |
1009 | ||
46533ff7 N |
1010 | if (test_bit(Faulty, &rdev->flags)) |
1011 | return; | |
1012 | ||
5a85071c | 1013 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 1014 | |
ed3b98c7 SL |
1015 | atomic_inc(&rdev->nr_pending); |
1016 | ||
74d46992 | 1017 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 1018 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
1019 | bio_add_page(bio, page, size, 0); |
1020 | bio->bi_private = rdev; | |
1021 | bio->bi_end_io = super_written; | |
46533ff7 N |
1022 | |
1023 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
1024 | test_bit(FailFast, &rdev->flags) && | |
1025 | !test_bit(LastDev, &rdev->flags)) | |
1026 | ff = MD_FAILFAST; | |
5a8948f8 | 1027 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 1028 | |
7bfa19f2 | 1029 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 1030 | submit_bio(bio); |
a9701a30 N |
1031 | } |
1032 | ||
46533ff7 | 1033 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 1034 | { |
e9c7469b | 1035 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 1036 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 1037 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
1038 | return -EAGAIN; |
1039 | return 0; | |
7bfa19f2 N |
1040 | } |
1041 | ||
3cb03002 | 1042 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 1043 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 1044 | { |
5a85071c | 1045 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
1046 | int ret; |
1047 | ||
74d46992 CH |
1048 | if (metadata_op && rdev->meta_bdev) |
1049 | bio_set_dev(bio, rdev->meta_bdev); | |
1050 | else | |
1051 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 1052 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 1053 | if (metadata_op) |
4f024f37 | 1054 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
1055 | else if (rdev->mddev->reshape_position != MaxSector && |
1056 | (rdev->mddev->reshape_backwards == | |
1057 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 1058 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 1059 | else |
4f024f37 | 1060 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 1061 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
1062 | |
1063 | submit_bio_wait(bio); | |
1da177e4 | 1064 | |
4e4cbee9 | 1065 | ret = !bio->bi_status; |
1da177e4 LT |
1066 | bio_put(bio); |
1067 | return ret; | |
1068 | } | |
a8745db2 | 1069 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 1070 | |
f72ffdd6 | 1071 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
1072 | { |
1073 | char b[BDEVNAME_SIZE]; | |
403df478 | 1074 | |
1da177e4 LT |
1075 | if (rdev->sb_loaded) |
1076 | return 0; | |
1077 | ||
796a5cf0 | 1078 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
1079 | goto fail; |
1080 | rdev->sb_loaded = 1; | |
1081 | return 0; | |
1082 | ||
1083 | fail: | |
9d48739e N |
1084 | pr_err("md: disabled device %s, could not read superblock.\n", |
1085 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1086 | return -EINVAL; |
1087 | } | |
1088 | ||
e6fd2093 | 1089 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 1090 | { |
f72ffdd6 | 1091 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
1092 | sb1->set_uuid1 == sb2->set_uuid1 && |
1093 | sb1->set_uuid2 == sb2->set_uuid2 && | |
1094 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
1095 | } |
1096 | ||
e6fd2093 | 1097 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
1098 | { |
1099 | int ret; | |
1100 | mdp_super_t *tmp1, *tmp2; | |
1101 | ||
1102 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
1103 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
1104 | ||
1105 | if (!tmp1 || !tmp2) { | |
1106 | ret = 0; | |
1da177e4 LT |
1107 | goto abort; |
1108 | } | |
1109 | ||
1110 | *tmp1 = *sb1; | |
1111 | *tmp2 = *sb2; | |
1112 | ||
1113 | /* | |
1114 | * nr_disks is not constant | |
1115 | */ | |
1116 | tmp1->nr_disks = 0; | |
1117 | tmp2->nr_disks = 0; | |
1118 | ||
ce0c8e05 | 1119 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 1120 | abort: |
990a8baf JJ |
1121 | kfree(tmp1); |
1122 | kfree(tmp2); | |
1da177e4 LT |
1123 | return ret; |
1124 | } | |
1125 | ||
4d167f09 N |
1126 | static u32 md_csum_fold(u32 csum) |
1127 | { | |
1128 | csum = (csum & 0xffff) + (csum >> 16); | |
1129 | return (csum & 0xffff) + (csum >> 16); | |
1130 | } | |
1131 | ||
f72ffdd6 | 1132 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1133 | { |
4d167f09 N |
1134 | u64 newcsum = 0; |
1135 | u32 *sb32 = (u32*)sb; | |
1136 | int i; | |
1da177e4 LT |
1137 | unsigned int disk_csum, csum; |
1138 | ||
1139 | disk_csum = sb->sb_csum; | |
1140 | sb->sb_csum = 0; | |
4d167f09 N |
1141 | |
1142 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1143 | newcsum += sb32[i]; | |
1144 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1145 | ||
4d167f09 N |
1146 | #ifdef CONFIG_ALPHA |
1147 | /* This used to use csum_partial, which was wrong for several | |
1148 | * reasons including that different results are returned on | |
1149 | * different architectures. It isn't critical that we get exactly | |
1150 | * the same return value as before (we always csum_fold before | |
1151 | * testing, and that removes any differences). However as we | |
1152 | * know that csum_partial always returned a 16bit value on | |
1153 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1154 | */ | |
1155 | sb->sb_csum = md_csum_fold(disk_csum); | |
1156 | #else | |
1da177e4 | 1157 | sb->sb_csum = disk_csum; |
4d167f09 | 1158 | #endif |
1da177e4 LT |
1159 | return csum; |
1160 | } | |
1161 | ||
1da177e4 LT |
1162 | /* |
1163 | * Handle superblock details. | |
1164 | * We want to be able to handle multiple superblock formats | |
1165 | * so we have a common interface to them all, and an array of | |
1166 | * different handlers. | |
1167 | * We rely on user-space to write the initial superblock, and support | |
1168 | * reading and updating of superblocks. | |
1169 | * Interface methods are: | |
3cb03002 | 1170 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1171 | * loads and validates a superblock on dev. |
1172 | * if refdev != NULL, compare superblocks on both devices | |
1173 | * Return: | |
1174 | * 0 - dev has a superblock that is compatible with refdev | |
1175 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1176 | * so dev should be used as the refdev in future | |
1177 | * -EINVAL superblock incompatible or invalid | |
1178 | * -othererror e.g. -EIO | |
1179 | * | |
fd01b88c | 1180 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1181 | * Verify that dev is acceptable into mddev. |
1182 | * The first time, mddev->raid_disks will be 0, and data from | |
1183 | * dev should be merged in. Subsequent calls check that dev | |
1184 | * is new enough. Return 0 or -EINVAL | |
1185 | * | |
fd01b88c | 1186 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1187 | * Update the superblock for rdev with data in mddev |
1188 | * This does not write to disc. | |
1189 | * | |
1190 | */ | |
1191 | ||
1192 | struct super_type { | |
0cd17fec CW |
1193 | char *name; |
1194 | struct module *owner; | |
c6563a8c N |
1195 | int (*load_super)(struct md_rdev *rdev, |
1196 | struct md_rdev *refdev, | |
0cd17fec | 1197 | int minor_version); |
c6563a8c N |
1198 | int (*validate_super)(struct mddev *mddev, |
1199 | struct md_rdev *rdev); | |
1200 | void (*sync_super)(struct mddev *mddev, | |
1201 | struct md_rdev *rdev); | |
3cb03002 | 1202 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1203 | sector_t num_sectors); |
c6563a8c N |
1204 | int (*allow_new_offset)(struct md_rdev *rdev, |
1205 | unsigned long long new_offset); | |
1da177e4 LT |
1206 | }; |
1207 | ||
0894cc30 AN |
1208 | /* |
1209 | * Check that the given mddev has no bitmap. | |
1210 | * | |
1211 | * This function is called from the run method of all personalities that do not | |
1212 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1213 | * has a bitmap. Otherwise, it returns 0. | |
1214 | * | |
1215 | */ | |
fd01b88c | 1216 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1217 | { |
c3d9714e | 1218 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1219 | return 0; |
9d48739e | 1220 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1221 | mdname(mddev), mddev->pers->name); |
1222 | return 1; | |
1223 | } | |
1224 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1225 | ||
1da177e4 | 1226 | /* |
f72ffdd6 | 1227 | * load_super for 0.90.0 |
1da177e4 | 1228 | */ |
3cb03002 | 1229 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1230 | { |
1231 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1232 | mdp_super_t *sb; | |
1233 | int ret; | |
228fc7d7 | 1234 | bool spare_disk = true; |
1da177e4 LT |
1235 | |
1236 | /* | |
0f420358 | 1237 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1238 | * it's at the end of the disk. |
1239 | * | |
1240 | * It also happens to be a multiple of 4Kb. | |
1241 | */ | |
57b2caa3 | 1242 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1243 | |
0002b271 | 1244 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1245 | if (ret) |
1246 | return ret; | |
1da177e4 LT |
1247 | |
1248 | ret = -EINVAL; | |
1249 | ||
1250 | bdevname(rdev->bdev, b); | |
65a06f06 | 1251 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1252 | |
1253 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1254 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1255 | goto abort; |
1256 | } | |
1257 | ||
1258 | if (sb->major_version != 0 || | |
f6705578 N |
1259 | sb->minor_version < 90 || |
1260 | sb->minor_version > 91) { | |
9d48739e N |
1261 | pr_warn("Bad version number %d.%d on %s\n", |
1262 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1263 | goto abort; |
1264 | } | |
1265 | ||
1266 | if (sb->raid_disks <= 0) | |
1267 | goto abort; | |
1268 | ||
4d167f09 | 1269 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1270 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1271 | goto abort; |
1272 | } | |
1273 | ||
1274 | rdev->preferred_minor = sb->md_minor; | |
1275 | rdev->data_offset = 0; | |
c6563a8c | 1276 | rdev->new_data_offset = 0; |
0002b271 | 1277 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1278 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1279 | |
1280 | if (sb->level == LEVEL_MULTIPATH) | |
1281 | rdev->desc_nr = -1; | |
1282 | else | |
1283 | rdev->desc_nr = sb->this_disk.number; | |
1284 | ||
228fc7d7 YY |
1285 | /* not spare disk, or LEVEL_MULTIPATH */ |
1286 | if (sb->level == LEVEL_MULTIPATH || | |
1287 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1288 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1289 | sb->disks[rdev->desc_nr].state & |
1290 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1291 | spare_disk = false; | |
1292 | ||
9a7b2b0f | 1293 | if (!refdev) { |
228fc7d7 | 1294 | if (!spare_disk) |
6a5cb53a YY |
1295 | ret = 1; |
1296 | else | |
1297 | ret = 0; | |
9a7b2b0f | 1298 | } else { |
1da177e4 | 1299 | __u64 ev1, ev2; |
65a06f06 | 1300 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1301 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1302 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1303 | b, bdevname(refdev->bdev,b2)); |
1304 | goto abort; | |
1305 | } | |
e6fd2093 | 1306 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1307 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1308 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1309 | goto abort; |
1310 | } | |
1311 | ev1 = md_event(sb); | |
1312 | ev2 = md_event(refsb); | |
6a5cb53a | 1313 | |
228fc7d7 | 1314 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1315 | ret = 1; |
f72ffdd6 | 1316 | else |
1da177e4 LT |
1317 | ret = 0; |
1318 | } | |
8190e754 | 1319 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1320 | /* Limit to 4TB as metadata cannot record more than that. |
1321 | * (not needed for Linear and RAID0 as metadata doesn't | |
1322 | * record this size) | |
1323 | */ | |
72deb455 | 1324 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1325 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1326 | |
27a7b260 | 1327 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1328 | /* "this cannot possibly happen" ... */ |
1329 | ret = -EINVAL; | |
1330 | ||
1da177e4 LT |
1331 | abort: |
1332 | return ret; | |
1333 | } | |
1334 | ||
1335 | /* | |
1336 | * validate_super for 0.90.0 | |
1337 | */ | |
fd01b88c | 1338 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1339 | { |
1340 | mdp_disk_t *desc; | |
65a06f06 | 1341 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1342 | __u64 ev1 = md_event(sb); |
1da177e4 | 1343 | |
41158c7e | 1344 | rdev->raid_disk = -1; |
c5d79adb N |
1345 | clear_bit(Faulty, &rdev->flags); |
1346 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1347 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1348 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1349 | |
1da177e4 LT |
1350 | if (mddev->raid_disks == 0) { |
1351 | mddev->major_version = 0; | |
1352 | mddev->minor_version = sb->minor_version; | |
1353 | mddev->patch_version = sb->patch_version; | |
e691063a | 1354 | mddev->external = 0; |
9d8f0363 | 1355 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1356 | mddev->ctime = sb->ctime; |
1357 | mddev->utime = sb->utime; | |
1358 | mddev->level = sb->level; | |
d9d166c2 | 1359 | mddev->clevel[0] = 0; |
1da177e4 LT |
1360 | mddev->layout = sb->layout; |
1361 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1362 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1363 | mddev->events = ev1; |
c3d9714e | 1364 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1365 | mddev->bitmap_info.space = 0; |
1366 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1367 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1368 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1369 | mddev->reshape_backwards = 0; |
1da177e4 | 1370 | |
f6705578 N |
1371 | if (mddev->minor_version >= 91) { |
1372 | mddev->reshape_position = sb->reshape_position; | |
1373 | mddev->delta_disks = sb->delta_disks; | |
1374 | mddev->new_level = sb->new_level; | |
1375 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1376 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1377 | if (mddev->delta_disks < 0) |
1378 | mddev->reshape_backwards = 1; | |
f6705578 N |
1379 | } else { |
1380 | mddev->reshape_position = MaxSector; | |
1381 | mddev->delta_disks = 0; | |
1382 | mddev->new_level = mddev->level; | |
1383 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1384 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1385 | } |
33f2c35a N |
1386 | if (mddev->level == 0) |
1387 | mddev->layout = -1; | |
f6705578 | 1388 | |
1da177e4 LT |
1389 | if (sb->state & (1<<MD_SB_CLEAN)) |
1390 | mddev->recovery_cp = MaxSector; | |
1391 | else { | |
f72ffdd6 | 1392 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1393 | sb->events_lo == sb->cp_events_lo) { |
1394 | mddev->recovery_cp = sb->recovery_cp; | |
1395 | } else | |
1396 | mddev->recovery_cp = 0; | |
1397 | } | |
1398 | ||
1399 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1400 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1401 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1402 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1403 | ||
1404 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1405 | |
1406 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1407 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1408 | mddev->bitmap_info.offset = |
1409 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1410 | mddev->bitmap_info.space = |
c9ad020f | 1411 | mddev->bitmap_info.default_space; |
6409bb05 | 1412 | } |
a654b9d8 | 1413 | |
41158c7e | 1414 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1415 | /* Insist on good event counter while assembling, except |
1416 | * for spares (which don't need an event count) */ | |
1da177e4 | 1417 | ++ev1; |
be6800a7 N |
1418 | if (sb->disks[rdev->desc_nr].state & ( |
1419 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1420 | if (ev1 < mddev->events) |
be6800a7 | 1421 | return -EINVAL; |
41158c7e N |
1422 | } else if (mddev->bitmap) { |
1423 | /* if adding to array with a bitmap, then we can accept an | |
1424 | * older device ... but not too old. | |
1425 | */ | |
41158c7e N |
1426 | if (ev1 < mddev->bitmap->events_cleared) |
1427 | return 0; | |
8313b8e5 N |
1428 | if (ev1 < mddev->events) |
1429 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1430 | } else { |
1431 | if (ev1 < mddev->events) | |
1432 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1433 | return 0; | |
1434 | } | |
41158c7e | 1435 | |
1da177e4 | 1436 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1437 | desc = sb->disks + rdev->desc_nr; |
1438 | ||
1439 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1440 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1441 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1442 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1443 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1444 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1445 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1446 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1447 | /* active but not in sync implies recovery up to | |
1448 | * reshape position. We don't know exactly where | |
1449 | * that is, so set to zero for now */ | |
1450 | if (mddev->minor_version >= 91) { | |
1451 | rdev->recovery_offset = 0; | |
1452 | rdev->raid_disk = desc->raid_disk; | |
1453 | } | |
1da177e4 | 1454 | } |
8ddf9efe N |
1455 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1456 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1457 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1458 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1459 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1460 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1461 | return 0; |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * sync_super for 0.90.0 | |
1466 | */ | |
fd01b88c | 1467 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1468 | { |
1469 | mdp_super_t *sb; | |
3cb03002 | 1470 | struct md_rdev *rdev2; |
1da177e4 | 1471 | int next_spare = mddev->raid_disks; |
19133a42 | 1472 | |
1da177e4 LT |
1473 | /* make rdev->sb match mddev data.. |
1474 | * | |
1475 | * 1/ zero out disks | |
1476 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1477 | * 3/ any empty disks < next_spare become removed | |
1478 | * | |
1479 | * disks[0] gets initialised to REMOVED because | |
1480 | * we cannot be sure from other fields if it has | |
1481 | * been initialised or not. | |
1482 | */ | |
1483 | int i; | |
1484 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1485 | ||
61181565 N |
1486 | rdev->sb_size = MD_SB_BYTES; |
1487 | ||
65a06f06 | 1488 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1489 | |
1490 | memset(sb, 0, sizeof(*sb)); | |
1491 | ||
1492 | sb->md_magic = MD_SB_MAGIC; | |
1493 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1494 | sb->patch_version = mddev->patch_version; |
1495 | sb->gvalid_words = 0; /* ignored */ | |
1496 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1497 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1498 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1499 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1500 | ||
9ebc6ef1 | 1501 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1502 | sb->level = mddev->level; |
58c0fed4 | 1503 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1504 | sb->raid_disks = mddev->raid_disks; |
1505 | sb->md_minor = mddev->md_minor; | |
e691063a | 1506 | sb->not_persistent = 0; |
9ebc6ef1 | 1507 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1508 | sb->state = 0; |
1509 | sb->events_hi = (mddev->events>>32); | |
1510 | sb->events_lo = (u32)mddev->events; | |
1511 | ||
f6705578 N |
1512 | if (mddev->reshape_position == MaxSector) |
1513 | sb->minor_version = 90; | |
1514 | else { | |
1515 | sb->minor_version = 91; | |
1516 | sb->reshape_position = mddev->reshape_position; | |
1517 | sb->new_level = mddev->new_level; | |
1518 | sb->delta_disks = mddev->delta_disks; | |
1519 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1520 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1521 | } |
1522 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1523 | if (mddev->in_sync) |
1524 | { | |
1525 | sb->recovery_cp = mddev->recovery_cp; | |
1526 | sb->cp_events_hi = (mddev->events>>32); | |
1527 | sb->cp_events_lo = (u32)mddev->events; | |
1528 | if (mddev->recovery_cp == MaxSector) | |
1529 | sb->state = (1<< MD_SB_CLEAN); | |
1530 | } else | |
1531 | sb->recovery_cp = 0; | |
1532 | ||
1533 | sb->layout = mddev->layout; | |
9d8f0363 | 1534 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1535 | |
c3d9714e | 1536 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1537 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1538 | ||
1da177e4 | 1539 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1540 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1541 | mdp_disk_t *d; |
86e6ffdd | 1542 | int desc_nr; |
0261cd9f N |
1543 | int is_active = test_bit(In_sync, &rdev2->flags); |
1544 | ||
1545 | if (rdev2->raid_disk >= 0 && | |
1546 | sb->minor_version >= 91) | |
1547 | /* we have nowhere to store the recovery_offset, | |
1548 | * but if it is not below the reshape_position, | |
1549 | * we can piggy-back on that. | |
1550 | */ | |
1551 | is_active = 1; | |
1552 | if (rdev2->raid_disk < 0 || | |
1553 | test_bit(Faulty, &rdev2->flags)) | |
1554 | is_active = 0; | |
1555 | if (is_active) | |
86e6ffdd | 1556 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1557 | else |
86e6ffdd | 1558 | desc_nr = next_spare++; |
19133a42 | 1559 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1560 | d = &sb->disks[rdev2->desc_nr]; |
1561 | nr_disks++; | |
1562 | d->number = rdev2->desc_nr; | |
1563 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1564 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1565 | if (is_active) |
1da177e4 LT |
1566 | d->raid_disk = rdev2->raid_disk; |
1567 | else | |
1568 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1569 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1570 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1571 | else if (is_active) { |
1da177e4 | 1572 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1573 | if (test_bit(In_sync, &rdev2->flags)) |
1574 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1575 | active++; |
1576 | working++; | |
1577 | } else { | |
1578 | d->state = 0; | |
1579 | spare++; | |
1580 | working++; | |
1581 | } | |
8ddf9efe N |
1582 | if (test_bit(WriteMostly, &rdev2->flags)) |
1583 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1584 | if (test_bit(FailFast, &rdev2->flags)) |
1585 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1586 | } |
1da177e4 LT |
1587 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1588 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1589 | mdp_disk_t *d = &sb->disks[i]; | |
1590 | if (d->state == 0 && d->number == 0) { | |
1591 | d->number = i; | |
1592 | d->raid_disk = i; | |
1593 | d->state = (1<<MD_DISK_REMOVED); | |
1594 | d->state |= (1<<MD_DISK_FAULTY); | |
1595 | failed++; | |
1596 | } | |
1597 | } | |
1598 | sb->nr_disks = nr_disks; | |
1599 | sb->active_disks = active; | |
1600 | sb->working_disks = working; | |
1601 | sb->failed_disks = failed; | |
1602 | sb->spare_disks = spare; | |
1603 | ||
1604 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1605 | sb->sb_csum = calc_sb_csum(sb); | |
1606 | } | |
1607 | ||
0cd17fec CW |
1608 | /* |
1609 | * rdev_size_change for 0.90.0 | |
1610 | */ | |
1611 | static unsigned long long | |
3cb03002 | 1612 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1613 | { |
58c0fed4 | 1614 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1615 | return 0; /* component must fit device */ |
c3d9714e | 1616 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1617 | return 0; /* can't move bitmap */ |
57b2caa3 | 1618 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1619 | if (!num_sectors || num_sectors > rdev->sb_start) |
1620 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1621 | /* Limit to 4TB as metadata cannot record more than that. |
1622 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1623 | */ | |
72deb455 | 1624 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1625 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1626 | do { |
1627 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1628 | rdev->sb_page); |
46533ff7 | 1629 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1630 | return num_sectors; |
0cd17fec CW |
1631 | } |
1632 | ||
c6563a8c N |
1633 | static int |
1634 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1635 | { | |
1636 | /* non-zero offset changes not possible with v0.90 */ | |
1637 | return new_offset == 0; | |
1638 | } | |
0cd17fec | 1639 | |
1da177e4 LT |
1640 | /* |
1641 | * version 1 superblock | |
1642 | */ | |
1643 | ||
f72ffdd6 | 1644 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1645 | { |
1c05b4bc N |
1646 | __le32 disk_csum; |
1647 | u32 csum; | |
1da177e4 LT |
1648 | unsigned long long newcsum; |
1649 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1650 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1651 | |
1652 | disk_csum = sb->sb_csum; | |
1653 | sb->sb_csum = 0; | |
1654 | newcsum = 0; | |
1f3c9907 | 1655 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1656 | newcsum += le32_to_cpu(*isuper++); |
1657 | ||
1658 | if (size == 2) | |
1c05b4bc | 1659 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1660 | |
1661 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1662 | sb->sb_csum = disk_csum; | |
1663 | return cpu_to_le32(csum); | |
1664 | } | |
1665 | ||
3cb03002 | 1666 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1667 | { |
1668 | struct mdp_superblock_1 *sb; | |
1669 | int ret; | |
0f420358 | 1670 | sector_t sb_start; |
c6563a8c | 1671 | sector_t sectors; |
1da177e4 | 1672 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1673 | int bmask; |
228fc7d7 | 1674 | bool spare_disk = true; |
1da177e4 LT |
1675 | |
1676 | /* | |
0f420358 | 1677 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1678 | * It is always aligned to a 4K boundary and |
1679 | * depeding on minor_version, it can be: | |
1680 | * 0: At least 8K, but less than 12K, from end of device | |
1681 | * 1: At start of device | |
1682 | * 2: 4K from start of device. | |
1683 | */ | |
1684 | switch(minor_version) { | |
1685 | case 0: | |
77304d2a | 1686 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1687 | sb_start -= 8*2; |
1688 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1689 | break; |
1690 | case 1: | |
0f420358 | 1691 | sb_start = 0; |
1da177e4 LT |
1692 | break; |
1693 | case 2: | |
0f420358 | 1694 | sb_start = 8; |
1da177e4 LT |
1695 | break; |
1696 | default: | |
1697 | return -EINVAL; | |
1698 | } | |
0f420358 | 1699 | rdev->sb_start = sb_start; |
1da177e4 | 1700 | |
0002b271 N |
1701 | /* superblock is rarely larger than 1K, but it can be larger, |
1702 | * and it is safe to read 4k, so we do that | |
1703 | */ | |
1704 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1705 | if (ret) return ret; |
1706 | ||
65a06f06 | 1707 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1708 | |
1709 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1710 | sb->major_version != cpu_to_le32(1) || | |
1711 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1712 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1713 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1714 | return -EINVAL; |
1715 | ||
1716 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1717 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1718 | bdevname(rdev->bdev,b)); |
1719 | return -EINVAL; | |
1720 | } | |
1721 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1722 | pr_warn("md: data_size too small on %s\n", |
1723 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1724 | return -EINVAL; |
1725 | } | |
c6563a8c N |
1726 | if (sb->pad0 || |
1727 | sb->pad3[0] || | |
1728 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1729 | /* Some padding is non-zero, might be a new feature */ | |
1730 | return -EINVAL; | |
e11e93fa | 1731 | |
1da177e4 LT |
1732 | rdev->preferred_minor = 0xffff; |
1733 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1734 | rdev->new_data_offset = rdev->data_offset; |
1735 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1736 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1737 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1738 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1739 | |
0002b271 | 1740 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1741 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1742 | if (rdev->sb_size & bmask) |
a1801f85 N |
1743 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1744 | ||
1745 | if (minor_version | |
0f420358 | 1746 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1747 | return -EINVAL; |
c6563a8c N |
1748 | if (minor_version |
1749 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1750 | return -EINVAL; | |
0002b271 | 1751 | |
31b65a0d N |
1752 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1753 | rdev->desc_nr = -1; | |
1754 | else | |
1755 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1756 | ||
2699b672 N |
1757 | if (!rdev->bb_page) { |
1758 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1759 | if (!rdev->bb_page) | |
1760 | return -ENOMEM; | |
1761 | } | |
1762 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1763 | rdev->badblocks.count == 0) { | |
1764 | /* need to load the bad block list. | |
1765 | * Currently we limit it to one page. | |
1766 | */ | |
1767 | s32 offset; | |
1768 | sector_t bb_sector; | |
00485d09 | 1769 | __le64 *bbp; |
2699b672 N |
1770 | int i; |
1771 | int sectors = le16_to_cpu(sb->bblog_size); | |
1772 | if (sectors > (PAGE_SIZE / 512)) | |
1773 | return -EINVAL; | |
1774 | offset = le32_to_cpu(sb->bblog_offset); | |
1775 | if (offset == 0) | |
1776 | return -EINVAL; | |
1777 | bb_sector = (long long)offset; | |
1778 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1779 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1780 | return -EIO; |
00485d09 | 1781 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1782 | rdev->badblocks.shift = sb->bblog_shift; |
1783 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1784 | u64 bb = le64_to_cpu(*bbp); | |
1785 | int count = bb & (0x3ff); | |
1786 | u64 sector = bb >> 10; | |
1787 | sector <<= sb->bblog_shift; | |
1788 | count <<= sb->bblog_shift; | |
1789 | if (bb + 1 == 0) | |
1790 | break; | |
fc974ee2 | 1791 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1792 | return -EINVAL; |
1793 | } | |
486adf72 N |
1794 | } else if (sb->bblog_offset != 0) |
1795 | rdev->badblocks.shift = 0; | |
2699b672 | 1796 | |
ddc08823 PB |
1797 | if ((le32_to_cpu(sb->feature_map) & |
1798 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1799 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1800 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1801 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1802 | } | |
1803 | ||
33f2c35a N |
1804 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1805 | sb->level != 0) | |
1806 | return -EINVAL; | |
1807 | ||
228fc7d7 YY |
1808 | /* not spare disk, or LEVEL_MULTIPATH */ |
1809 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1810 | (rdev->desc_nr >= 0 && | |
1811 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1812 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1813 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1814 | spare_disk = false; | |
6a5cb53a | 1815 | |
9a7b2b0f | 1816 | if (!refdev) { |
228fc7d7 | 1817 | if (!spare_disk) |
6a5cb53a YY |
1818 | ret = 1; |
1819 | else | |
1820 | ret = 0; | |
9a7b2b0f | 1821 | } else { |
1da177e4 | 1822 | __u64 ev1, ev2; |
65a06f06 | 1823 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1824 | |
1825 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1826 | sb->level != refsb->level || | |
1827 | sb->layout != refsb->layout || | |
1828 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1829 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1830 | bdevname(rdev->bdev,b), |
1831 | bdevname(refdev->bdev,b2)); | |
1832 | return -EINVAL; | |
1833 | } | |
1834 | ev1 = le64_to_cpu(sb->events); | |
1835 | ev2 = le64_to_cpu(refsb->events); | |
1836 | ||
228fc7d7 | 1837 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1838 | ret = 1; |
1839 | else | |
1840 | ret = 0; | |
1da177e4 | 1841 | } |
c6563a8c N |
1842 | if (minor_version) { |
1843 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1844 | sectors -= rdev->data_offset; | |
1845 | } else | |
1846 | sectors = rdev->sb_start; | |
1847 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1848 | return -EINVAL; |
dd8ac336 | 1849 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1850 | return ret; |
1da177e4 LT |
1851 | } |
1852 | ||
fd01b88c | 1853 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1854 | { |
65a06f06 | 1855 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1856 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1857 | |
41158c7e | 1858 | rdev->raid_disk = -1; |
c5d79adb N |
1859 | clear_bit(Faulty, &rdev->flags); |
1860 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1861 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1862 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1863 | |
1da177e4 LT |
1864 | if (mddev->raid_disks == 0) { |
1865 | mddev->major_version = 1; | |
1866 | mddev->patch_version = 0; | |
e691063a | 1867 | mddev->external = 0; |
9d8f0363 | 1868 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1869 | mddev->ctime = le64_to_cpu(sb->ctime); |
1870 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1871 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1872 | mddev->clevel[0] = 0; |
1da177e4 LT |
1873 | mddev->layout = le32_to_cpu(sb->layout); |
1874 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1875 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1876 | mddev->events = ev1; |
c3d9714e | 1877 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1878 | mddev->bitmap_info.space = 0; |
1879 | /* Default location for bitmap is 1K after superblock | |
1880 | * using 3K - total of 4K | |
1881 | */ | |
c3d9714e | 1882 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1883 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1884 | mddev->reshape_backwards = 0; |
1885 | ||
1da177e4 LT |
1886 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1887 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1888 | ||
1889 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1890 | |
71c0805c | 1891 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1892 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1893 | mddev->bitmap_info.offset = |
1894 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1895 | /* Metadata doesn't record how much space is available. |
1896 | * For 1.0, we assume we can use up to the superblock | |
1897 | * if before, else to 4K beyond superblock. | |
1898 | * For others, assume no change is possible. | |
1899 | */ | |
1900 | if (mddev->minor_version > 0) | |
1901 | mddev->bitmap_info.space = 0; | |
1902 | else if (mddev->bitmap_info.offset > 0) | |
1903 | mddev->bitmap_info.space = | |
1904 | 8 - mddev->bitmap_info.offset; | |
1905 | else | |
1906 | mddev->bitmap_info.space = | |
1907 | -mddev->bitmap_info.offset; | |
1908 | } | |
e11e93fa | 1909 | |
f6705578 N |
1910 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1911 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1912 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1913 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1914 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1915 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1916 | if (mddev->delta_disks < 0 || |
1917 | (mddev->delta_disks == 0 && | |
1918 | (le32_to_cpu(sb->feature_map) | |
1919 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1920 | mddev->reshape_backwards = 1; | |
f6705578 N |
1921 | } else { |
1922 | mddev->reshape_position = MaxSector; | |
1923 | mddev->delta_disks = 0; | |
1924 | mddev->new_level = mddev->level; | |
1925 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1926 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1927 | } |
1928 | ||
33f2c35a N |
1929 | if (mddev->level == 0 && |
1930 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1931 | mddev->layout = -1; | |
1932 | ||
486b0f7b | 1933 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1934 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1935 | |
ddc08823 PB |
1936 | if (le32_to_cpu(sb->feature_map) & |
1937 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1938 | if (le32_to_cpu(sb->feature_map) & |
1939 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1940 | return -EINVAL; | |
ddc08823 PB |
1941 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1942 | (le32_to_cpu(sb->feature_map) & | |
1943 | MD_FEATURE_MULTIPLE_PPLS)) | |
1944 | return -EINVAL; | |
ea0213e0 AP |
1945 | set_bit(MD_HAS_PPL, &mddev->flags); |
1946 | } | |
41158c7e | 1947 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1948 | /* Insist of good event counter while assembling, except for |
1949 | * spares (which don't need an event count) */ | |
1da177e4 | 1950 | ++ev1; |
be6800a7 N |
1951 | if (rdev->desc_nr >= 0 && |
1952 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1953 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1954 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1955 | if (ev1 < mddev->events) |
1956 | return -EINVAL; | |
41158c7e N |
1957 | } else if (mddev->bitmap) { |
1958 | /* If adding to array with a bitmap, then we can accept an | |
1959 | * older device, but not too old. | |
1960 | */ | |
41158c7e N |
1961 | if (ev1 < mddev->bitmap->events_cleared) |
1962 | return 0; | |
8313b8e5 N |
1963 | if (ev1 < mddev->events) |
1964 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1965 | } else { |
1966 | if (ev1 < mddev->events) | |
1967 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1968 | return 0; | |
1969 | } | |
1da177e4 LT |
1970 | if (mddev->level != LEVEL_MULTIPATH) { |
1971 | int role; | |
3673f305 N |
1972 | if (rdev->desc_nr < 0 || |
1973 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1974 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1975 | rdev->desc_nr = -1; |
1976 | } else | |
1977 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1978 | switch(role) { |
c4d4c91b | 1979 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1980 | break; |
c4d4c91b | 1981 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1982 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1983 | break; |
bac624f3 SL |
1984 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1985 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1986 | /* journal device without journal feature */ | |
9d48739e | 1987 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1988 | return -EINVAL; |
1989 | } | |
1990 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1991 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1992 | rdev->raid_disk = 0; |
bac624f3 | 1993 | break; |
1da177e4 | 1994 | default: |
f466722c | 1995 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1996 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1997 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1998 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1999 | if (!(le32_to_cpu(sb->feature_map) & |
2000 | MD_FEATURE_RECOVERY_BITMAP)) | |
2001 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
2002 | } else { |
2003 | /* | |
2004 | * If the array is FROZEN, then the device can't | |
2005 | * be in_sync with rest of array. | |
2006 | */ | |
2007 | if (!test_bit(MD_RECOVERY_FROZEN, | |
2008 | &mddev->recovery)) | |
2009 | set_bit(In_sync, &rdev->flags); | |
2010 | } | |
1da177e4 LT |
2011 | rdev->raid_disk = role; |
2012 | break; | |
2013 | } | |
8ddf9efe N |
2014 | if (sb->devflags & WriteMostly1) |
2015 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
2016 | if (sb->devflags & FailFast1) |
2017 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
2018 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
2019 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 2020 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 2021 | set_bit(In_sync, &rdev->flags); |
41158c7e | 2022 | |
1da177e4 LT |
2023 | return 0; |
2024 | } | |
2025 | ||
fd01b88c | 2026 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
2027 | { |
2028 | struct mdp_superblock_1 *sb; | |
3cb03002 | 2029 | struct md_rdev *rdev2; |
1da177e4 LT |
2030 | int max_dev, i; |
2031 | /* make rdev->sb match mddev and rdev data. */ | |
2032 | ||
65a06f06 | 2033 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
2034 | |
2035 | sb->feature_map = 0; | |
2036 | sb->pad0 = 0; | |
5fd6c1dc | 2037 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
2038 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
2039 | ||
2040 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
2041 | sb->events = cpu_to_le64(mddev->events); | |
2042 | if (mddev->in_sync) | |
2043 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
2044 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
2045 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
2046 | else |
2047 | sb->resync_offset = cpu_to_le64(0); | |
2048 | ||
1c05b4bc | 2049 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 2050 | |
f0ca340c | 2051 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 2052 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 2053 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
2054 | sb->level = cpu_to_le32(mddev->level); |
2055 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
2056 | if (test_bit(FailFast, &rdev->flags)) |
2057 | sb->devflags |= FailFast1; | |
2058 | else | |
2059 | sb->devflags &= ~FailFast1; | |
f0ca340c | 2060 | |
aeb9b211 N |
2061 | if (test_bit(WriteMostly, &rdev->flags)) |
2062 | sb->devflags |= WriteMostly1; | |
2063 | else | |
2064 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
2065 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
2066 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 2067 | |
c3d9714e N |
2068 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
2069 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 2070 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 2071 | } |
5fd6c1dc | 2072 | |
f2076e7d | 2073 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 2074 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
2075 | sb->feature_map |= |
2076 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
2077 | sb->recovery_offset = | |
2078 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
2079 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
2080 | sb->feature_map |= | |
2081 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 2082 | } |
3069aa8d SL |
2083 | /* Note: recovery_offset and journal_tail share space */ |
2084 | if (test_bit(Journal, &rdev->flags)) | |
2085 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
2086 | if (test_bit(Replacement, &rdev->flags)) |
2087 | sb->feature_map |= | |
2088 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 2089 | |
f6705578 N |
2090 | if (mddev->reshape_position != MaxSector) { |
2091 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
2092 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
2093 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
2094 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
2095 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 2096 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
2097 | if (mddev->delta_disks == 0 && |
2098 | mddev->reshape_backwards) | |
2099 | sb->feature_map | |
2100 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
2101 | if (rdev->new_data_offset != rdev->data_offset) { |
2102 | sb->feature_map | |
2103 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
2104 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
2105 | - rdev->data_offset)); | |
2106 | } | |
f6705578 | 2107 | } |
a654b9d8 | 2108 | |
3c462c88 GR |
2109 | if (mddev_is_clustered(mddev)) |
2110 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
2111 | ||
2699b672 N |
2112 | if (rdev->badblocks.count == 0) |
2113 | /* Nothing to do for bad blocks*/ ; | |
2114 | else if (sb->bblog_offset == 0) | |
2115 | /* Cannot record bad blocks on this device */ | |
2116 | md_error(mddev, rdev); | |
2117 | else { | |
2118 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 2119 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
2120 | u64 *p = bb->page; |
2121 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
2122 | if (bb->changed) { | |
2123 | unsigned seq; | |
2124 | ||
2125 | retry: | |
2126 | seq = read_seqbegin(&bb->lock); | |
2127 | ||
2128 | memset(bbp, 0xff, PAGE_SIZE); | |
2129 | ||
2130 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2131 | u64 internal_bb = p[i]; |
2699b672 N |
2132 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2133 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2134 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2135 | } |
d0962936 | 2136 | bb->changed = 0; |
2699b672 N |
2137 | if (read_seqretry(&bb->lock, seq)) |
2138 | goto retry; | |
2139 | ||
2140 | bb->sector = (rdev->sb_start + | |
2141 | (int)le32_to_cpu(sb->bblog_offset)); | |
2142 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2143 | } |
2144 | } | |
2145 | ||
1da177e4 | 2146 | max_dev = 0; |
dafb20fa | 2147 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2148 | if (rdev2->desc_nr+1 > max_dev) |
2149 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2150 | |
70471daf N |
2151 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2152 | int bmask; | |
a778b73f | 2153 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2154 | rdev->sb_size = max_dev * 2 + 256; |
2155 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2156 | if (rdev->sb_size & bmask) | |
2157 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2158 | } else |
2159 | max_dev = le32_to_cpu(sb->max_dev); | |
2160 | ||
1da177e4 | 2161 | for (i=0; i<max_dev;i++) |
8df72024 | 2162 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2163 | |
a97b7896 SL |
2164 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2165 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2166 | |
ea0213e0 | 2167 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2168 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2169 | sb->feature_map |= | |
2170 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2171 | else | |
2172 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2173 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2174 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2175 | } | |
2176 | ||
dafb20fa | 2177 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2178 | i = rdev2->desc_nr; |
b2d444d7 | 2179 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2180 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2181 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2182 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2183 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2184 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2185 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2186 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2187 | else |
c4d4c91b | 2188 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2189 | } |
2190 | ||
1da177e4 LT |
2191 | sb->sb_csum = calc_sb_1_csum(sb); |
2192 | } | |
2193 | ||
0cd17fec | 2194 | static unsigned long long |
3cb03002 | 2195 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2196 | { |
2197 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2198 | sector_t max_sectors; |
58c0fed4 | 2199 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2200 | return 0; /* component must fit device */ |
c6563a8c N |
2201 | if (rdev->data_offset != rdev->new_data_offset) |
2202 | return 0; /* too confusing */ | |
0f420358 | 2203 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2204 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2205 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2206 | max_sectors -= rdev->data_offset; |
2207 | if (!num_sectors || num_sectors > max_sectors) | |
2208 | num_sectors = max_sectors; | |
c3d9714e | 2209 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2210 | /* minor version 0 with bitmap we can't move */ |
2211 | return 0; | |
2212 | } else { | |
2213 | /* minor version 0; superblock after data */ | |
0f420358 | 2214 | sector_t sb_start; |
77304d2a | 2215 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 2216 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 2217 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
2218 | if (!num_sectors || num_sectors > max_sectors) |
2219 | num_sectors = max_sectors; | |
0f420358 | 2220 | rdev->sb_start = sb_start; |
0cd17fec | 2221 | } |
65a06f06 | 2222 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2223 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2224 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2225 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2226 | do { |
2227 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2228 | rdev->sb_page); | |
2229 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2230 | return num_sectors; |
c6563a8c N |
2231 | |
2232 | } | |
2233 | ||
2234 | static int | |
2235 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2236 | unsigned long long new_offset) | |
2237 | { | |
2238 | /* All necessary checks on new >= old have been done */ | |
2239 | struct bitmap *bitmap; | |
2240 | if (new_offset >= rdev->data_offset) | |
2241 | return 1; | |
2242 | ||
2243 | /* with 1.0 metadata, there is no metadata to tread on | |
2244 | * so we can always move back */ | |
2245 | if (rdev->mddev->minor_version == 0) | |
2246 | return 1; | |
2247 | ||
2248 | /* otherwise we must be sure not to step on | |
2249 | * any metadata, so stay: | |
2250 | * 36K beyond start of superblock | |
2251 | * beyond end of badblocks | |
2252 | * beyond write-intent bitmap | |
2253 | */ | |
2254 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2255 | return 0; | |
2256 | bitmap = rdev->mddev->bitmap; | |
2257 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2258 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2259 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2260 | return 0; |
2261 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2262 | return 0; | |
2263 | ||
2264 | return 1; | |
0cd17fec | 2265 | } |
1da177e4 | 2266 | |
75c96f85 | 2267 | static struct super_type super_types[] = { |
1da177e4 LT |
2268 | [0] = { |
2269 | .name = "0.90.0", | |
2270 | .owner = THIS_MODULE, | |
0cd17fec CW |
2271 | .load_super = super_90_load, |
2272 | .validate_super = super_90_validate, | |
2273 | .sync_super = super_90_sync, | |
2274 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2275 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2276 | }, |
2277 | [1] = { | |
2278 | .name = "md-1", | |
2279 | .owner = THIS_MODULE, | |
0cd17fec CW |
2280 | .load_super = super_1_load, |
2281 | .validate_super = super_1_validate, | |
2282 | .sync_super = super_1_sync, | |
2283 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2284 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2285 | }, |
2286 | }; | |
1da177e4 | 2287 | |
fd01b88c | 2288 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2289 | { |
2290 | if (mddev->sync_super) { | |
2291 | mddev->sync_super(mddev, rdev); | |
2292 | return; | |
2293 | } | |
2294 | ||
2295 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2296 | ||
2297 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2298 | } | |
2299 | ||
fd01b88c | 2300 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2301 | { |
3cb03002 | 2302 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2303 | |
4b80991c | 2304 | rcu_read_lock(); |
0b020e85 SL |
2305 | rdev_for_each_rcu(rdev, mddev1) { |
2306 | if (test_bit(Faulty, &rdev->flags) || | |
2307 | test_bit(Journal, &rdev->flags) || | |
2308 | rdev->raid_disk == -1) | |
2309 | continue; | |
2310 | rdev_for_each_rcu(rdev2, mddev2) { | |
2311 | if (test_bit(Faulty, &rdev2->flags) || | |
2312 | test_bit(Journal, &rdev2->flags) || | |
2313 | rdev2->raid_disk == -1) | |
2314 | continue; | |
7dd5e7c3 | 2315 | if (rdev->bdev->bd_contains == |
4b80991c N |
2316 | rdev2->bdev->bd_contains) { |
2317 | rcu_read_unlock(); | |
7dd5e7c3 | 2318 | return 1; |
4b80991c | 2319 | } |
0b020e85 SL |
2320 | } |
2321 | } | |
4b80991c | 2322 | rcu_read_unlock(); |
1da177e4 LT |
2323 | return 0; |
2324 | } | |
2325 | ||
2326 | static LIST_HEAD(pending_raid_disks); | |
2327 | ||
ac5e7113 AN |
2328 | /* |
2329 | * Try to register data integrity profile for an mddev | |
2330 | * | |
2331 | * This is called when an array is started and after a disk has been kicked | |
2332 | * from the array. It only succeeds if all working and active component devices | |
2333 | * are integrity capable with matching profiles. | |
2334 | */ | |
fd01b88c | 2335 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2336 | { |
3cb03002 | 2337 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2338 | |
2339 | if (list_empty(&mddev->disks)) | |
2340 | return 0; /* nothing to do */ | |
629acb6a JB |
2341 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2342 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2343 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2344 | /* skip spares and non-functional disks */ |
2345 | if (test_bit(Faulty, &rdev->flags)) | |
2346 | continue; | |
2347 | if (rdev->raid_disk < 0) | |
2348 | continue; | |
ac5e7113 AN |
2349 | if (!reference) { |
2350 | /* Use the first rdev as the reference */ | |
2351 | reference = rdev; | |
2352 | continue; | |
2353 | } | |
2354 | /* does this rdev's profile match the reference profile? */ | |
2355 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2356 | rdev->bdev->bd_disk) < 0) | |
2357 | return -EINVAL; | |
2358 | } | |
89078d57 MP |
2359 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2360 | return 0; | |
ac5e7113 AN |
2361 | /* |
2362 | * All component devices are integrity capable and have matching | |
2363 | * profiles, register the common profile for the md device. | |
2364 | */ | |
25520d55 MP |
2365 | blk_integrity_register(mddev->gendisk, |
2366 | bdev_get_integrity(reference->bdev)); | |
2367 | ||
9d48739e | 2368 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2369 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2370 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2371 | mdname(mddev)); |
2372 | return -EINVAL; | |
2373 | } | |
ac5e7113 AN |
2374 | return 0; |
2375 | } | |
2376 | EXPORT_SYMBOL(md_integrity_register); | |
2377 | ||
1501efad DW |
2378 | /* |
2379 | * Attempt to add an rdev, but only if it is consistent with the current | |
2380 | * integrity profile | |
2381 | */ | |
2382 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2383 | { |
2863b9eb | 2384 | struct blk_integrity *bi_mddev; |
1501efad | 2385 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2386 | |
2387 | if (!mddev->gendisk) | |
1501efad | 2388 | return 0; |
2863b9eb | 2389 | |
2863b9eb | 2390 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2391 | |
ac5e7113 | 2392 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2393 | return 0; |
2394 | ||
2395 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2396 | pr_err("%s: incompatible integrity profile for %s\n", |
2397 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2398 | return -ENXIO; |
2399 | } | |
2400 | ||
2401 | return 0; | |
3f9d99c1 | 2402 | } |
ac5e7113 | 2403 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2404 | |
f72ffdd6 | 2405 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2406 | { |
7dd5e7c3 | 2407 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2408 | struct kobject *ko; |
5e55e2f5 | 2409 | int err; |
1da177e4 | 2410 | |
11e2ede0 DW |
2411 | /* prevent duplicates */ |
2412 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2413 | return -EEXIST; | |
2414 | ||
97b20ef7 N |
2415 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2416 | mddev->pers) | |
2417 | return -EROFS; | |
2418 | ||
dd8ac336 | 2419 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2420 | if (!test_bit(Journal, &rdev->flags) && |
2421 | rdev->sectors && | |
2422 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2423 | if (mddev->pers) { |
2424 | /* Cannot change size, so fail | |
2425 | * If mddev->level <= 0, then we don't care | |
2426 | * about aligning sizes (e.g. linear) | |
2427 | */ | |
2428 | if (mddev->level > 0) | |
2429 | return -ENOSPC; | |
2430 | } else | |
dd8ac336 | 2431 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2432 | } |
1da177e4 LT |
2433 | |
2434 | /* Verify rdev->desc_nr is unique. | |
2435 | * If it is -1, assign a free number, else | |
2436 | * check number is not in use | |
2437 | */ | |
4878e9eb | 2438 | rcu_read_lock(); |
1da177e4 LT |
2439 | if (rdev->desc_nr < 0) { |
2440 | int choice = 0; | |
4878e9eb N |
2441 | if (mddev->pers) |
2442 | choice = mddev->raid_disks; | |
57d051dc | 2443 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2444 | choice++; |
2445 | rdev->desc_nr = choice; | |
2446 | } else { | |
57d051dc | 2447 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2448 | rcu_read_unlock(); |
1da177e4 | 2449 | return -EBUSY; |
4878e9eb | 2450 | } |
1da177e4 | 2451 | } |
4878e9eb | 2452 | rcu_read_unlock(); |
f6b6ec5c SL |
2453 | if (!test_bit(Journal, &rdev->flags) && |
2454 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2455 | pr_warn("md: %s: array is limited to %d devices\n", |
2456 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2457 | return -EBUSY; |
2458 | } | |
19133a42 | 2459 | bdevname(rdev->bdev,b); |
90a9befb | 2460 | strreplace(b, '/', '!'); |
649316b2 | 2461 | |
1da177e4 | 2462 | rdev->mddev = mddev; |
9d48739e | 2463 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2464 | |
963c555e | 2465 | if (mddev->raid_disks) |
404659cf | 2466 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2467 | |
b2d6db58 | 2468 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2469 | goto fail; |
86e6ffdd | 2470 | |
0762b8bd | 2471 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
5e3b8a8d DLM |
2472 | /* failure here is OK */ |
2473 | err = sysfs_create_link(&rdev->kobj, ko, "block"); | |
00bcb4ac | 2474 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); |
e1a86dbb JB |
2475 | rdev->sysfs_unack_badblocks = |
2476 | sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); | |
2477 | rdev->sysfs_badblocks = | |
2478 | sysfs_get_dirent_safe(rdev->kobj.sd, "bad_blocks"); | |
3c0ee63a | 2479 | |
4b80991c | 2480 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2481 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2482 | |
2483 | /* May as well allow recovery to be retried once */ | |
5389042f | 2484 | mddev->recovery_disabled++; |
3f9d99c1 | 2485 | |
1da177e4 | 2486 | return 0; |
5e55e2f5 N |
2487 | |
2488 | fail: | |
9d48739e N |
2489 | pr_warn("md: failed to register dev-%s for %s\n", |
2490 | b, mdname(mddev)); | |
5e55e2f5 | 2491 | return err; |
1da177e4 LT |
2492 | } |
2493 | ||
cc1ffe61 | 2494 | static void rdev_delayed_delete(struct work_struct *ws) |
5792a285 | 2495 | { |
3cb03002 | 2496 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2497 | kobject_del(&rdev->kobj); |
177a99b2 | 2498 | kobject_put(&rdev->kobj); |
5792a285 N |
2499 | } |
2500 | ||
f72ffdd6 | 2501 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2502 | { |
2503 | char b[BDEVNAME_SIZE]; | |
403df478 | 2504 | |
49731baa | 2505 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2506 | list_del_rcu(&rdev->same_set); |
9d48739e | 2507 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
11d3a9f6 | 2508 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
1da177e4 | 2509 | rdev->mddev = NULL; |
86e6ffdd | 2510 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a | 2511 | sysfs_put(rdev->sysfs_state); |
e1a86dbb JB |
2512 | sysfs_put(rdev->sysfs_unack_badblocks); |
2513 | sysfs_put(rdev->sysfs_badblocks); | |
3c0ee63a | 2514 | rdev->sysfs_state = NULL; |
e1a86dbb JB |
2515 | rdev->sysfs_unack_badblocks = NULL; |
2516 | rdev->sysfs_badblocks = NULL; | |
2230dfe4 | 2517 | rdev->badblocks.count = 0; |
5792a285 | 2518 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2519 | * writing to 'remove' to "dev/state". We also need |
2520 | * to delay it due to rcu usage. | |
5792a285 | 2521 | */ |
4b80991c | 2522 | synchronize_rcu(); |
cc1ffe61 | 2523 | INIT_WORK(&rdev->del_work, rdev_delayed_delete); |
177a99b2 | 2524 | kobject_get(&rdev->kobj); |
cc1ffe61 | 2525 | queue_work(md_rdev_misc_wq, &rdev->del_work); |
1da177e4 LT |
2526 | } |
2527 | ||
2528 | /* | |
2529 | * prevent the device from being mounted, repartitioned or | |
2530 | * otherwise reused by a RAID array (or any other kernel | |
2531 | * subsystem), by bd_claiming the device. | |
2532 | */ | |
3cb03002 | 2533 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2534 | { |
2535 | int err = 0; | |
2536 | struct block_device *bdev; | |
1da177e4 | 2537 | |
d4d77629 | 2538 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2539 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2540 | if (IS_ERR(bdev)) { |
ea3edd4d CH |
2541 | pr_warn("md: could not open device unknown-block(%u,%u).\n", |
2542 | MAJOR(dev), MINOR(dev)); | |
1da177e4 LT |
2543 | return PTR_ERR(bdev); |
2544 | } | |
1da177e4 LT |
2545 | rdev->bdev = bdev; |
2546 | return err; | |
2547 | } | |
2548 | ||
3cb03002 | 2549 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2550 | { |
2551 | struct block_device *bdev = rdev->bdev; | |
2552 | rdev->bdev = NULL; | |
e525fd89 | 2553 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2554 | } |
2555 | ||
2556 | void md_autodetect_dev(dev_t dev); | |
2557 | ||
f72ffdd6 | 2558 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2559 | { |
2560 | char b[BDEVNAME_SIZE]; | |
403df478 | 2561 | |
9d48739e | 2562 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2563 | md_rdev_clear(rdev); |
1da177e4 | 2564 | #ifndef MODULE |
d0fae18f N |
2565 | if (test_bit(AutoDetected, &rdev->flags)) |
2566 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2567 | #endif |
2568 | unlock_rdev(rdev); | |
86e6ffdd | 2569 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2570 | } |
2571 | ||
fb56dfef | 2572 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2573 | { |
2574 | unbind_rdev_from_array(rdev); | |
2575 | export_rdev(rdev); | |
2576 | } | |
fb56dfef | 2577 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2578 | |
fd01b88c | 2579 | static void export_array(struct mddev *mddev) |
1da177e4 | 2580 | { |
0638bb0e | 2581 | struct md_rdev *rdev; |
1da177e4 | 2582 | |
0638bb0e N |
2583 | while (!list_empty(&mddev->disks)) { |
2584 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2585 | same_set); | |
fb56dfef | 2586 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2587 | } |
1da177e4 LT |
2588 | mddev->raid_disks = 0; |
2589 | mddev->major_version = 0; | |
2590 | } | |
2591 | ||
6497709b N |
2592 | static bool set_in_sync(struct mddev *mddev) |
2593 | { | |
efa4b77b | 2594 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2595 | if (!mddev->in_sync) { |
2596 | mddev->sync_checkers++; | |
2597 | spin_unlock(&mddev->lock); | |
2598 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2599 | spin_lock(&mddev->lock); | |
2600 | if (!mddev->in_sync && | |
2601 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2602 | mddev->in_sync = 1; |
4ad23a97 N |
2603 | /* |
2604 | * Ensure ->in_sync is visible before we clear | |
2605 | * ->sync_checkers. | |
2606 | */ | |
55cc39f3 | 2607 | smp_mb(); |
6497709b N |
2608 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2609 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2610 | } | |
4ad23a97 N |
2611 | if (--mddev->sync_checkers == 0) |
2612 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2613 | } |
2614 | if (mddev->safemode == 1) | |
2615 | mddev->safemode = 0; | |
2616 | return mddev->in_sync; | |
2617 | } | |
2618 | ||
f72ffdd6 | 2619 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2620 | { |
42543769 N |
2621 | /* Update each superblock (in-memory image), but |
2622 | * if we are allowed to, skip spares which already | |
2623 | * have the right event counter, or have one earlier | |
2624 | * (which would mean they aren't being marked as dirty | |
2625 | * with the rest of the array) | |
2626 | */ | |
3cb03002 | 2627 | struct md_rdev *rdev; |
dafb20fa | 2628 | rdev_for_each(rdev, mddev) { |
42543769 N |
2629 | if (rdev->sb_events == mddev->events || |
2630 | (nospares && | |
2631 | rdev->raid_disk < 0 && | |
42543769 N |
2632 | rdev->sb_events+1 == mddev->events)) { |
2633 | /* Don't update this superblock */ | |
2634 | rdev->sb_loaded = 2; | |
2635 | } else { | |
076f968b | 2636 | sync_super(mddev, rdev); |
42543769 N |
2637 | rdev->sb_loaded = 1; |
2638 | } | |
1da177e4 LT |
2639 | } |
2640 | } | |
2641 | ||
2aa82191 GR |
2642 | static bool does_sb_need_changing(struct mddev *mddev) |
2643 | { | |
2644 | struct md_rdev *rdev; | |
2645 | struct mdp_superblock_1 *sb; | |
2646 | int role; | |
2647 | ||
2648 | /* Find a good rdev */ | |
2649 | rdev_for_each(rdev, mddev) | |
2650 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2651 | break; | |
2652 | ||
2653 | /* No good device found. */ | |
2654 | if (!rdev) | |
2655 | return false; | |
2656 | ||
2657 | sb = page_address(rdev->sb_page); | |
2658 | /* Check if a device has become faulty or a spare become active */ | |
2659 | rdev_for_each(rdev, mddev) { | |
2660 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2661 | /* Device activated? */ | |
2662 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2663 | !test_bit(Faulty, &rdev->flags)) | |
2664 | return true; | |
2665 | /* Device turned faulty? */ | |
2666 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2667 | return true; | |
2668 | } | |
2669 | ||
2670 | /* Check if any mddev parameters have changed */ | |
2671 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2672 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2673 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2674 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2675 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2676 | return true; | |
2677 | ||
2678 | return false; | |
2679 | } | |
2680 | ||
1aee41f6 | 2681 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2682 | { |
3cb03002 | 2683 | struct md_rdev *rdev; |
06d91a5f | 2684 | int sync_req; |
42543769 | 2685 | int nospares = 0; |
2699b672 | 2686 | int any_badblocks_changed = 0; |
23b63f9f | 2687 | int ret = -1; |
1da177e4 | 2688 | |
d87f064f N |
2689 | if (mddev->ro) { |
2690 | if (force_change) | |
2953079c | 2691 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2692 | return; |
2693 | } | |
2aa82191 | 2694 | |
2c97cf13 | 2695 | repeat: |
2aa82191 | 2696 | if (mddev_is_clustered(mddev)) { |
2953079c | 2697 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2698 | force_change = 1; |
2953079c | 2699 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2700 | nospares = 1; |
23b63f9f | 2701 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2702 | /* Has someone else has updated the sb */ |
2703 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2704 | if (ret == 0) |
2705 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2706 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2707 | BIT(MD_SB_CHANGE_DEVS) | | |
2708 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2709 | return; |
2710 | } | |
2711 | } | |
2c97cf13 | 2712 | |
db0505d3 N |
2713 | /* |
2714 | * First make sure individual recovery_offsets are correct | |
2715 | * curr_resync_completed can only be used during recovery. | |
2716 | * During reshape/resync it might use array-addresses rather | |
2717 | * that device addresses. | |
2718 | */ | |
dafb20fa | 2719 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2720 | if (rdev->raid_disk >= 0 && |
2721 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2722 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2723 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2724 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2725 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2726 | !test_bit(In_sync, &rdev->flags) && |
2727 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2728 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2729 | ||
f72ffdd6 | 2730 | } |
bd52b746 | 2731 | if (!mddev->persistent) { |
2953079c SL |
2732 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2733 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2734 | if (!mddev->external) { |
2953079c | 2735 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2736 | rdev_for_each(rdev, mddev) { |
de393cde | 2737 | if (rdev->badblocks.changed) { |
d0962936 | 2738 | rdev->badblocks.changed = 0; |
fc974ee2 | 2739 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2740 | md_error(mddev, rdev); |
2741 | } | |
2742 | clear_bit(Blocked, &rdev->flags); | |
2743 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2744 | wake_up(&rdev->blocked_wait); | |
2745 | } | |
2746 | } | |
3a3a5ddb N |
2747 | wake_up(&mddev->sb_wait); |
2748 | return; | |
2749 | } | |
2750 | ||
85572d7c | 2751 | spin_lock(&mddev->lock); |
84692195 | 2752 | |
9ebc6ef1 | 2753 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2754 | |
2953079c | 2755 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2756 | force_change = 1; |
2953079c | 2757 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2758 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2759 | * though if events isn't the right even/odd, we will have to do | |
2760 | * spares after all | |
2761 | */ | |
2762 | nospares = 1; | |
2763 | if (force_change) | |
2764 | nospares = 0; | |
2765 | if (mddev->degraded) | |
84692195 N |
2766 | /* If the array is degraded, then skipping spares is both |
2767 | * dangerous and fairly pointless. | |
2768 | * Dangerous because a device that was removed from the array | |
2769 | * might have a event_count that still looks up-to-date, | |
2770 | * so it can be re-added without a resync. | |
2771 | * Pointless because if there are any spares to skip, | |
2772 | * then a recovery will happen and soon that array won't | |
2773 | * be degraded any more and the spare can go back to sleep then. | |
2774 | */ | |
850b2b42 | 2775 | nospares = 0; |
84692195 | 2776 | |
06d91a5f | 2777 | sync_req = mddev->in_sync; |
42543769 N |
2778 | |
2779 | /* If this is just a dirty<->clean transition, and the array is clean | |
2780 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2781 | if (nospares |
42543769 | 2782 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2783 | && mddev->can_decrease_events |
2784 | && mddev->events != 1) { | |
42543769 | 2785 | mddev->events--; |
a8707c08 N |
2786 | mddev->can_decrease_events = 0; |
2787 | } else { | |
42543769 N |
2788 | /* otherwise we have to go forward and ... */ |
2789 | mddev->events ++; | |
a8707c08 | 2790 | mddev->can_decrease_events = nospares; |
42543769 | 2791 | } |
1da177e4 | 2792 | |
403df478 N |
2793 | /* |
2794 | * This 64-bit counter should never wrap. | |
2795 | * Either we are in around ~1 trillion A.C., assuming | |
2796 | * 1 reboot per second, or we have a bug... | |
2797 | */ | |
2798 | WARN_ON(mddev->events == 0); | |
2699b672 | 2799 | |
dafb20fa | 2800 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2801 | if (rdev->badblocks.changed) |
2802 | any_badblocks_changed++; | |
de393cde N |
2803 | if (test_bit(Faulty, &rdev->flags)) |
2804 | set_bit(FaultRecorded, &rdev->flags); | |
2805 | } | |
2699b672 | 2806 | |
e691063a | 2807 | sync_sbs(mddev, nospares); |
85572d7c | 2808 | spin_unlock(&mddev->lock); |
1da177e4 | 2809 | |
36a4e1fe N |
2810 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2811 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2812 | |
504634f6 SL |
2813 | if (mddev->queue) |
2814 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2815 | rewrite: |
e64e4018 | 2816 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2817 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2818 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2819 | |
42543769 N |
2820 | if (rdev->sb_loaded != 1) |
2821 | continue; /* no noise on spare devices */ | |
1da177e4 | 2822 | |
f466722c | 2823 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2824 | md_super_write(mddev,rdev, |
0f420358 | 2825 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2826 | rdev->sb_page); |
36a4e1fe N |
2827 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2828 | bdevname(rdev->bdev, b), | |
2829 | (unsigned long long)rdev->sb_start); | |
42543769 | 2830 | rdev->sb_events = mddev->events; |
2699b672 N |
2831 | if (rdev->badblocks.size) { |
2832 | md_super_write(mddev, rdev, | |
2833 | rdev->badblocks.sector, | |
2834 | rdev->badblocks.size << 9, | |
2835 | rdev->bb_page); | |
2836 | rdev->badblocks.size = 0; | |
2837 | } | |
7bfa19f2 | 2838 | |
f466722c | 2839 | } else |
36a4e1fe N |
2840 | pr_debug("md: %s (skipping faulty)\n", |
2841 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2842 | |
7bfa19f2 | 2843 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2844 | /* only need to write one superblock... */ |
2845 | break; | |
2846 | } | |
46533ff7 N |
2847 | if (md_super_wait(mddev) < 0) |
2848 | goto rewrite; | |
2953079c | 2849 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2850 | |
2c97cf13 GJ |
2851 | if (mddev_is_clustered(mddev) && ret == 0) |
2852 | md_cluster_ops->metadata_update_finish(mddev); | |
2853 | ||
850b2b42 | 2854 | if (mddev->in_sync != sync_req || |
2953079c SL |
2855 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2856 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2857 | /* have to write it out again */ |
06d91a5f | 2858 | goto repeat; |
3d310eb7 | 2859 | wake_up(&mddev->sb_wait); |
acb180b0 | 2860 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
e1a86dbb | 2861 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
06d91a5f | 2862 | |
dafb20fa | 2863 | rdev_for_each(rdev, mddev) { |
de393cde N |
2864 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2865 | clear_bit(Blocked, &rdev->flags); | |
2866 | ||
2867 | if (any_badblocks_changed) | |
fc974ee2 | 2868 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2869 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2870 | wake_up(&rdev->blocked_wait); | |
2871 | } | |
1da177e4 | 2872 | } |
1aee41f6 | 2873 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2874 | |
a6da4ef8 GR |
2875 | static int add_bound_rdev(struct md_rdev *rdev) |
2876 | { | |
2877 | struct mddev *mddev = rdev->mddev; | |
2878 | int err = 0; | |
87d4d916 | 2879 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2880 | |
87d4d916 | 2881 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2882 | /* If there is hot_add_disk but no hot_remove_disk |
2883 | * then added disks for geometry changes, | |
2884 | * and should be added immediately. | |
2885 | */ | |
2886 | super_types[mddev->major_version]. | |
2887 | validate_super(mddev, rdev); | |
87d4d916 SL |
2888 | if (add_journal) |
2889 | mddev_suspend(mddev); | |
a6da4ef8 | 2890 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2891 | if (add_journal) |
2892 | mddev_resume(mddev); | |
a6da4ef8 | 2893 | if (err) { |
db767672 | 2894 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2895 | return err; |
2896 | } | |
2897 | } | |
2898 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2899 | ||
2953079c | 2900 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2901 | if (mddev->degraded) |
2902 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2903 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2904 | md_new_event(mddev); | |
2905 | md_wakeup_thread(mddev->thread); | |
2906 | return 0; | |
2907 | } | |
1da177e4 | 2908 | |
7f6ce769 | 2909 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2910 | * We want to accept with case. For this we use cmd_match. |
2911 | */ | |
2912 | static int cmd_match(const char *cmd, const char *str) | |
2913 | { | |
2914 | /* See if cmd, written into a sysfs file, matches | |
2915 | * str. They must either be the same, or cmd can | |
2916 | * have a trailing newline | |
2917 | */ | |
2918 | while (*cmd && *str && *cmd == *str) { | |
2919 | cmd++; | |
2920 | str++; | |
2921 | } | |
2922 | if (*cmd == '\n') | |
2923 | cmd++; | |
2924 | if (*str || *cmd) | |
2925 | return 0; | |
2926 | return 1; | |
2927 | } | |
2928 | ||
86e6ffdd N |
2929 | struct rdev_sysfs_entry { |
2930 | struct attribute attr; | |
3cb03002 N |
2931 | ssize_t (*show)(struct md_rdev *, char *); |
2932 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2933 | }; |
2934 | ||
2935 | static ssize_t | |
3cb03002 | 2936 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2937 | { |
35b785f7 | 2938 | char *sep = ","; |
20a49ff6 | 2939 | size_t len = 0; |
6aa7de05 | 2940 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2941 | |
758bfc8a | 2942 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2943 | (!test_bit(ExternalBbl, &flags) && |
2944 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2945 | len += sprintf(page+len, "faulty%s", sep); |
2946 | if (test_bit(In_sync, &flags)) | |
2947 | len += sprintf(page+len, "in_sync%s", sep); | |
2948 | if (test_bit(Journal, &flags)) | |
2949 | len += sprintf(page+len, "journal%s", sep); | |
2950 | if (test_bit(WriteMostly, &flags)) | |
2951 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2952 | if (test_bit(Blocked, &flags) || |
52c64152 | 2953 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2954 | && !test_bit(Faulty, &flags))) |
2955 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2956 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2957 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2958 | !test_bit(In_sync, &flags)) |
2959 | len += sprintf(page+len, "spare%s", sep); | |
2960 | if (test_bit(WriteErrorSeen, &flags)) | |
2961 | len += sprintf(page+len, "write_error%s", sep); | |
2962 | if (test_bit(WantReplacement, &flags)) | |
2963 | len += sprintf(page+len, "want_replacement%s", sep); | |
2964 | if (test_bit(Replacement, &flags)) | |
2965 | len += sprintf(page+len, "replacement%s", sep); | |
2966 | if (test_bit(ExternalBbl, &flags)) | |
2967 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2968 | if (test_bit(FailFast, &flags)) |
2969 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2970 | |
2971 | if (len) | |
2972 | len -= strlen(sep); | |
2d78f8c4 | 2973 | |
86e6ffdd N |
2974 | return len+sprintf(page+len, "\n"); |
2975 | } | |
2976 | ||
45dc2de1 | 2977 | static ssize_t |
3cb03002 | 2978 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2979 | { |
2980 | /* can write | |
de393cde | 2981 | * faulty - simulates an error |
45dc2de1 | 2982 | * remove - disconnects the device |
f655675b N |
2983 | * writemostly - sets write_mostly |
2984 | * -writemostly - clears write_mostly | |
de393cde N |
2985 | * blocked - sets the Blocked flags |
2986 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2987 | * insync - sets Insync providing device isn't active |
f466722c N |
2988 | * -insync - clear Insync for a device with a slot assigned, |
2989 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2990 | * write_error - sets WriteErrorSeen |
2991 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2992 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2993 | */ |
2994 | int err = -EINVAL; | |
2995 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2996 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2997 | if (test_bit(Faulty, &rdev->flags)) |
2998 | err = 0; | |
2999 | else | |
3000 | err = -EBUSY; | |
45dc2de1 | 3001 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
3002 | if (rdev->mddev->pers) { |
3003 | clear_bit(Blocked, &rdev->flags); | |
3004 | remove_and_add_spares(rdev->mddev, rdev); | |
3005 | } | |
45dc2de1 N |
3006 | if (rdev->raid_disk >= 0) |
3007 | err = -EBUSY; | |
3008 | else { | |
fd01b88c | 3009 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 3010 | err = 0; |
a9720903 GJ |
3011 | if (mddev_is_clustered(mddev)) |
3012 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
3013 | ||
3014 | if (err == 0) { | |
3015 | md_kick_rdev_from_array(rdev); | |
060b0689 | 3016 | if (mddev->pers) { |
2953079c | 3017 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
3018 | md_wakeup_thread(mddev->thread); |
3019 | } | |
a9720903 GJ |
3020 | md_new_event(mddev); |
3021 | } | |
45dc2de1 | 3022 | } |
f655675b N |
3023 | } else if (cmd_match(buf, "writemostly")) { |
3024 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 3025 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
f655675b N |
3026 | err = 0; |
3027 | } else if (cmd_match(buf, "-writemostly")) { | |
11d3a9f6 | 3028 | mddev_destroy_serial_pool(rdev->mddev, rdev, false); |
f655675b | 3029 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
3030 | err = 0; |
3031 | } else if (cmd_match(buf, "blocked")) { | |
3032 | set_bit(Blocked, &rdev->flags); | |
3033 | err = 0; | |
3034 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 3035 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 3036 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 3037 | rdev->badblocks.unacked_exist) { |
de393cde N |
3038 | /* metadata handler doesn't understand badblocks, |
3039 | * so we need to fail the device | |
3040 | */ | |
3041 | md_error(rdev->mddev, rdev); | |
3042 | } | |
6bfe0b49 | 3043 | clear_bit(Blocked, &rdev->flags); |
de393cde | 3044 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
3045 | wake_up(&rdev->blocked_wait); |
3046 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3047 | md_wakeup_thread(rdev->mddev->thread); | |
3048 | ||
6d56e278 N |
3049 | err = 0; |
3050 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
3051 | set_bit(In_sync, &rdev->flags); | |
f655675b | 3052 | err = 0; |
688834e6 N |
3053 | } else if (cmd_match(buf, "failfast")) { |
3054 | set_bit(FailFast, &rdev->flags); | |
3055 | err = 0; | |
3056 | } else if (cmd_match(buf, "-failfast")) { | |
3057 | clear_bit(FailFast, &rdev->flags); | |
3058 | err = 0; | |
f2076e7d SL |
3059 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
3060 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
3061 | if (rdev->mddev->pers == NULL) { |
3062 | clear_bit(In_sync, &rdev->flags); | |
3063 | rdev->saved_raid_disk = rdev->raid_disk; | |
3064 | rdev->raid_disk = -1; | |
3065 | err = 0; | |
3066 | } | |
d7a9d443 N |
3067 | } else if (cmd_match(buf, "write_error")) { |
3068 | set_bit(WriteErrorSeen, &rdev->flags); | |
3069 | err = 0; | |
3070 | } else if (cmd_match(buf, "-write_error")) { | |
3071 | clear_bit(WriteErrorSeen, &rdev->flags); | |
3072 | err = 0; | |
2d78f8c4 N |
3073 | } else if (cmd_match(buf, "want_replacement")) { |
3074 | /* Any non-spare device that is not a replacement can | |
3075 | * become want_replacement at any time, but we then need to | |
3076 | * check if recovery is needed. | |
3077 | */ | |
3078 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 3079 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
3080 | !test_bit(Replacement, &rdev->flags)) |
3081 | set_bit(WantReplacement, &rdev->flags); | |
3082 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
3083 | md_wakeup_thread(rdev->mddev->thread); | |
3084 | err = 0; | |
3085 | } else if (cmd_match(buf, "-want_replacement")) { | |
3086 | /* Clearing 'want_replacement' is always allowed. | |
3087 | * Once replacements starts it is too late though. | |
3088 | */ | |
3089 | err = 0; | |
3090 | clear_bit(WantReplacement, &rdev->flags); | |
3091 | } else if (cmd_match(buf, "replacement")) { | |
3092 | /* Can only set a device as a replacement when array has not | |
3093 | * yet been started. Once running, replacement is automatic | |
3094 | * from spares, or by assigning 'slot'. | |
3095 | */ | |
3096 | if (rdev->mddev->pers) | |
3097 | err = -EBUSY; | |
3098 | else { | |
3099 | set_bit(Replacement, &rdev->flags); | |
3100 | err = 0; | |
3101 | } | |
3102 | } else if (cmd_match(buf, "-replacement")) { | |
3103 | /* Similarly, can only clear Replacement before start */ | |
3104 | if (rdev->mddev->pers) | |
3105 | err = -EBUSY; | |
3106 | else { | |
3107 | clear_bit(Replacement, &rdev->flags); | |
3108 | err = 0; | |
3109 | } | |
a6da4ef8 | 3110 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
3111 | if (!rdev->mddev->pers) |
3112 | err = -EINVAL; | |
3113 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
3114 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
3115 | /* clear_bit is performed _after_ all the devices |
3116 | * have their local Faulty bit cleared. If any writes | |
3117 | * happen in the meantime in the local node, they | |
3118 | * will land in the local bitmap, which will be synced | |
3119 | * by this node eventually | |
3120 | */ | |
3121 | if (!mddev_is_clustered(rdev->mddev) || | |
3122 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
3123 | clear_bit(Faulty, &rdev->flags); | |
3124 | err = add_bound_rdev(rdev); | |
3125 | } | |
a6da4ef8 GR |
3126 | } else |
3127 | err = -EBUSY; | |
35b785f7 TM |
3128 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
3129 | set_bit(ExternalBbl, &rdev->flags); | |
3130 | rdev->badblocks.shift = 0; | |
3131 | err = 0; | |
3132 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3133 | clear_bit(ExternalBbl, &rdev->flags); | |
3134 | err = 0; | |
45dc2de1 | 3135 | } |
00bcb4ac N |
3136 | if (!err) |
3137 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3138 | return err ? err : len; |
3139 | } | |
80ca3a44 | 3140 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3141 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3142 | |
4dbcdc75 | 3143 | static ssize_t |
3cb03002 | 3144 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3145 | { |
3146 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3147 | } | |
3148 | ||
3149 | static ssize_t | |
3cb03002 | 3150 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3151 | { |
4c9309c0 AD |
3152 | unsigned int n; |
3153 | int rv; | |
3154 | ||
3155 | rv = kstrtouint(buf, 10, &n); | |
3156 | if (rv < 0) | |
3157 | return rv; | |
3158 | atomic_set(&rdev->corrected_errors, n); | |
3159 | return len; | |
4dbcdc75 N |
3160 | } |
3161 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3162 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3163 | |
014236d2 | 3164 | static ssize_t |
3cb03002 | 3165 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3166 | { |
f2076e7d SL |
3167 | if (test_bit(Journal, &rdev->flags)) |
3168 | return sprintf(page, "journal\n"); | |
3169 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3170 | return sprintf(page, "none\n"); |
3171 | else | |
3172 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3173 | } | |
3174 | ||
3175 | static ssize_t | |
3cb03002 | 3176 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3177 | { |
4c9309c0 | 3178 | int slot; |
c303da6d | 3179 | int err; |
4c9309c0 | 3180 | |
f2076e7d SL |
3181 | if (test_bit(Journal, &rdev->flags)) |
3182 | return -EBUSY; | |
014236d2 N |
3183 | if (strncmp(buf, "none", 4)==0) |
3184 | slot = -1; | |
4c9309c0 AD |
3185 | else { |
3186 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3187 | if (err < 0) | |
3188 | return err; | |
3189 | } | |
6c2fce2e | 3190 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3191 | /* Setting 'slot' on an active array requires also |
3192 | * updating the 'rd%d' link, and communicating | |
3193 | * with the personality with ->hot_*_disk. | |
3194 | * For now we only support removing | |
3195 | * failed/spare devices. This normally happens automatically, | |
3196 | * but not when the metadata is externally managed. | |
3197 | */ | |
c303da6d N |
3198 | if (rdev->raid_disk == -1) |
3199 | return -EEXIST; | |
3200 | /* personality does all needed checks */ | |
01393f3d | 3201 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3202 | return -EINVAL; |
746d3207 N |
3203 | clear_bit(Blocked, &rdev->flags); |
3204 | remove_and_add_spares(rdev->mddev, rdev); | |
3205 | if (rdev->raid_disk >= 0) | |
3206 | return -EBUSY; | |
c303da6d N |
3207 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3208 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3209 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3210 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3211 | * if we ever get bitmaps working here. |
6c2fce2e | 3212 | */ |
cb01c549 | 3213 | int err; |
6c2fce2e NB |
3214 | |
3215 | if (rdev->raid_disk != -1) | |
3216 | return -EBUSY; | |
3217 | ||
c6751b2b N |
3218 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3219 | return -EBUSY; | |
3220 | ||
6c2fce2e NB |
3221 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3222 | return -EINVAL; | |
3223 | ||
ba1b41b6 N |
3224 | if (slot >= rdev->mddev->raid_disks && |
3225 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3226 | return -ENOSPC; | |
3227 | ||
6c2fce2e NB |
3228 | rdev->raid_disk = slot; |
3229 | if (test_bit(In_sync, &rdev->flags)) | |
3230 | rdev->saved_raid_disk = slot; | |
3231 | else | |
3232 | rdev->saved_raid_disk = -1; | |
d30519fc | 3233 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3234 | clear_bit(Bitmap_sync, &rdev->flags); |
3f79cc22 | 3235 | err = rdev->mddev->pers->hot_add_disk(rdev->mddev, rdev); |
cb01c549 GR |
3236 | if (err) { |
3237 | rdev->raid_disk = -1; | |
3238 | return err; | |
3239 | } else | |
3240 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
5e3b8a8d DLM |
3241 | /* failure here is OK */; |
3242 | sysfs_link_rdev(rdev->mddev, rdev); | |
6c2fce2e | 3243 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3244 | } else { |
ba1b41b6 N |
3245 | if (slot >= rdev->mddev->raid_disks && |
3246 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3247 | return -ENOSPC; |
3248 | rdev->raid_disk = slot; | |
3249 | /* assume it is working */ | |
c5d79adb N |
3250 | clear_bit(Faulty, &rdev->flags); |
3251 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3252 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3253 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3254 | } |
014236d2 N |
3255 | return len; |
3256 | } | |
3257 | ||
014236d2 | 3258 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3259 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3260 | |
93c8cad0 | 3261 | static ssize_t |
3cb03002 | 3262 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3263 | { |
6961ece4 | 3264 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3265 | } |
3266 | ||
3267 | static ssize_t | |
3cb03002 | 3268 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3269 | { |
c6563a8c | 3270 | unsigned long long offset; |
b29bebd6 | 3271 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3272 | return -EINVAL; |
8ed0a521 | 3273 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3274 | return -EBUSY; |
dd8ac336 | 3275 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3276 | /* Must set offset before size, so overlap checks |
3277 | * can be sane */ | |
3278 | return -EBUSY; | |
93c8cad0 | 3279 | rdev->data_offset = offset; |
25f7fd47 | 3280 | rdev->new_data_offset = offset; |
93c8cad0 N |
3281 | return len; |
3282 | } | |
3283 | ||
3284 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3285 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3286 | |
c6563a8c N |
3287 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3288 | { | |
3289 | return sprintf(page, "%llu\n", | |
3290 | (unsigned long long)rdev->new_data_offset); | |
3291 | } | |
3292 | ||
3293 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3294 | const char *buf, size_t len) | |
3295 | { | |
3296 | unsigned long long new_offset; | |
3297 | struct mddev *mddev = rdev->mddev; | |
3298 | ||
b29bebd6 | 3299 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3300 | return -EINVAL; |
3301 | ||
f851b60d N |
3302 | if (mddev->sync_thread || |
3303 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3304 | return -EBUSY; |
3305 | if (new_offset == rdev->data_offset) | |
3306 | /* reset is always permitted */ | |
3307 | ; | |
3308 | else if (new_offset > rdev->data_offset) { | |
3309 | /* must not push array size beyond rdev_sectors */ | |
3310 | if (new_offset - rdev->data_offset | |
3311 | + mddev->dev_sectors > rdev->sectors) | |
3312 | return -E2BIG; | |
3313 | } | |
3314 | /* Metadata worries about other space details. */ | |
3315 | ||
3316 | /* decreasing the offset is inconsistent with a backwards | |
3317 | * reshape. | |
3318 | */ | |
3319 | if (new_offset < rdev->data_offset && | |
3320 | mddev->reshape_backwards) | |
3321 | return -EINVAL; | |
3322 | /* Increasing offset is inconsistent with forwards | |
3323 | * reshape. reshape_direction should be set to | |
3324 | * 'backwards' first. | |
3325 | */ | |
3326 | if (new_offset > rdev->data_offset && | |
3327 | !mddev->reshape_backwards) | |
3328 | return -EINVAL; | |
3329 | ||
3330 | if (mddev->pers && mddev->persistent && | |
3331 | !super_types[mddev->major_version] | |
3332 | .allow_new_offset(rdev, new_offset)) | |
3333 | return -E2BIG; | |
3334 | rdev->new_data_offset = new_offset; | |
3335 | if (new_offset > rdev->data_offset) | |
3336 | mddev->reshape_backwards = 1; | |
3337 | else if (new_offset < rdev->data_offset) | |
3338 | mddev->reshape_backwards = 0; | |
3339 | ||
3340 | return len; | |
3341 | } | |
3342 | static struct rdev_sysfs_entry rdev_new_offset = | |
3343 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3344 | ||
83303b61 | 3345 | static ssize_t |
3cb03002 | 3346 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3347 | { |
dd8ac336 | 3348 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3349 | } |
3350 | ||
c5d79adb N |
3351 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3352 | { | |
3353 | /* check if two start/length pairs overlap */ | |
3354 | if (s1+l1 <= s2) | |
3355 | return 0; | |
3356 | if (s2+l2 <= s1) | |
3357 | return 0; | |
3358 | return 1; | |
3359 | } | |
3360 | ||
b522adcd DW |
3361 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3362 | { | |
3363 | unsigned long long blocks; | |
3364 | sector_t new; | |
3365 | ||
b29bebd6 | 3366 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3367 | return -EINVAL; |
3368 | ||
3369 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3370 | return -EINVAL; /* sector conversion overflow */ | |
3371 | ||
3372 | new = blocks * 2; | |
3373 | if (new != blocks * 2) | |
3374 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3375 | ||
3376 | *sectors = new; | |
3377 | return 0; | |
3378 | } | |
3379 | ||
83303b61 | 3380 | static ssize_t |
3cb03002 | 3381 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3382 | { |
fd01b88c | 3383 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3384 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3385 | sector_t sectors; |
27c529bb | 3386 | |
f2076e7d SL |
3387 | if (test_bit(Journal, &rdev->flags)) |
3388 | return -EBUSY; | |
b522adcd | 3389 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3390 | return -EINVAL; |
c6563a8c N |
3391 | if (rdev->data_offset != rdev->new_data_offset) |
3392 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3393 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3394 | if (my_mddev->persistent) { |
dd8ac336 AN |
3395 | sectors = super_types[my_mddev->major_version]. |
3396 | rdev_size_change(rdev, sectors); | |
3397 | if (!sectors) | |
0cd17fec | 3398 | return -EBUSY; |
dd8ac336 | 3399 | } else if (!sectors) |
77304d2a | 3400 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3401 | rdev->data_offset; |
a6468539 N |
3402 | if (!my_mddev->pers->resize) |
3403 | /* Cannot change size for RAID0 or Linear etc */ | |
3404 | return -EINVAL; | |
0cd17fec | 3405 | } |
dd8ac336 | 3406 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3407 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3408 | |
dd8ac336 AN |
3409 | rdev->sectors = sectors; |
3410 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3411 | /* Need to check that all other rdevs with the same |
3412 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3413 | * the rdev lists safely. | |
3414 | * This check does not provide a hard guarantee, it | |
3415 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3416 | */ |
fd01b88c | 3417 | struct mddev *mddev; |
c5d79adb | 3418 | int overlap = 0; |
159ec1fc | 3419 | struct list_head *tmp; |
c5d79adb | 3420 | |
8b1afc3d | 3421 | rcu_read_lock(); |
29ac4aa3 | 3422 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3423 | struct md_rdev *rdev2; |
c5d79adb | 3424 | |
dafb20fa | 3425 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3426 | if (rdev->bdev == rdev2->bdev && |
3427 | rdev != rdev2 && | |
3428 | overlaps(rdev->data_offset, rdev->sectors, | |
3429 | rdev2->data_offset, | |
3430 | rdev2->sectors)) { | |
c5d79adb N |
3431 | overlap = 1; |
3432 | break; | |
3433 | } | |
c5d79adb N |
3434 | if (overlap) { |
3435 | mddev_put(mddev); | |
3436 | break; | |
3437 | } | |
3438 | } | |
8b1afc3d | 3439 | rcu_read_unlock(); |
c5d79adb N |
3440 | if (overlap) { |
3441 | /* Someone else could have slipped in a size | |
3442 | * change here, but doing so is just silly. | |
dd8ac336 | 3443 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3444 | * safe, and trust userspace not to race with |
3445 | * itself | |
3446 | */ | |
dd8ac336 | 3447 | rdev->sectors = oldsectors; |
c5d79adb N |
3448 | return -EBUSY; |
3449 | } | |
3450 | } | |
83303b61 N |
3451 | return len; |
3452 | } | |
3453 | ||
3454 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3455 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3456 | |
3cb03002 | 3457 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3458 | { |
3459 | unsigned long long recovery_start = rdev->recovery_offset; | |
3460 | ||
3461 | if (test_bit(In_sync, &rdev->flags) || | |
3462 | recovery_start == MaxSector) | |
3463 | return sprintf(page, "none\n"); | |
3464 | ||
3465 | return sprintf(page, "%llu\n", recovery_start); | |
3466 | } | |
3467 | ||
3cb03002 | 3468 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3469 | { |
3470 | unsigned long long recovery_start; | |
3471 | ||
3472 | if (cmd_match(buf, "none")) | |
3473 | recovery_start = MaxSector; | |
b29bebd6 | 3474 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3475 | return -EINVAL; |
3476 | ||
3477 | if (rdev->mddev->pers && | |
3478 | rdev->raid_disk >= 0) | |
3479 | return -EBUSY; | |
3480 | ||
3481 | rdev->recovery_offset = recovery_start; | |
3482 | if (recovery_start == MaxSector) | |
3483 | set_bit(In_sync, &rdev->flags); | |
3484 | else | |
3485 | clear_bit(In_sync, &rdev->flags); | |
3486 | return len; | |
3487 | } | |
3488 | ||
3489 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3490 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3491 | ||
fc974ee2 VV |
3492 | /* sysfs access to bad-blocks list. |
3493 | * We present two files. | |
3494 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3495 | * are recorded as bad. The list is truncated to fit within | |
3496 | * the one-page limit of sysfs. | |
3497 | * Writing "sector length" to this file adds an acknowledged | |
3498 | * bad block list. | |
3499 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3500 | * been acknowledged. Writing to this file adds bad blocks | |
3501 | * without acknowledging them. This is largely for testing. | |
3502 | */ | |
3cb03002 | 3503 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3504 | { |
3505 | return badblocks_show(&rdev->badblocks, page, 0); | |
3506 | } | |
3cb03002 | 3507 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3508 | { |
de393cde N |
3509 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3510 | /* Maybe that ack was all we needed */ | |
3511 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3512 | wake_up(&rdev->blocked_wait); | |
3513 | return rv; | |
16c791a5 N |
3514 | } |
3515 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3516 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3517 | ||
3cb03002 | 3518 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3519 | { |
3520 | return badblocks_show(&rdev->badblocks, page, 1); | |
3521 | } | |
3cb03002 | 3522 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3523 | { |
3524 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3525 | } | |
3526 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3527 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3528 | ||
664aed04 AP |
3529 | static ssize_t |
3530 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3531 | { | |
3532 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3533 | } | |
3534 | ||
3535 | static ssize_t | |
3536 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3537 | { | |
3538 | unsigned long long sector; | |
3539 | ||
3540 | if (kstrtoull(buf, 10, §or) < 0) | |
3541 | return -EINVAL; | |
3542 | if (sector != (sector_t)sector) | |
3543 | return -EINVAL; | |
3544 | ||
3545 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3546 | rdev->raid_disk >= 0) | |
3547 | return -EBUSY; | |
3548 | ||
3549 | if (rdev->mddev->persistent) { | |
3550 | if (rdev->mddev->major_version == 0) | |
3551 | return -EINVAL; | |
3552 | if ((sector > rdev->sb_start && | |
3553 | sector - rdev->sb_start > S16_MAX) || | |
3554 | (sector < rdev->sb_start && | |
3555 | rdev->sb_start - sector > -S16_MIN)) | |
3556 | return -EINVAL; | |
3557 | rdev->ppl.offset = sector - rdev->sb_start; | |
3558 | } else if (!rdev->mddev->external) { | |
3559 | return -EBUSY; | |
3560 | } | |
3561 | rdev->ppl.sector = sector; | |
3562 | return len; | |
3563 | } | |
3564 | ||
3565 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3566 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3567 | ||
3568 | static ssize_t | |
3569 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3570 | { | |
3571 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3572 | } | |
3573 | ||
3574 | static ssize_t | |
3575 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3576 | { | |
3577 | unsigned int size; | |
3578 | ||
3579 | if (kstrtouint(buf, 10, &size) < 0) | |
3580 | return -EINVAL; | |
3581 | ||
3582 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3583 | rdev->raid_disk >= 0) | |
3584 | return -EBUSY; | |
3585 | ||
3586 | if (rdev->mddev->persistent) { | |
3587 | if (rdev->mddev->major_version == 0) | |
3588 | return -EINVAL; | |
3589 | if (size > U16_MAX) | |
3590 | return -EINVAL; | |
3591 | } else if (!rdev->mddev->external) { | |
3592 | return -EBUSY; | |
3593 | } | |
3594 | rdev->ppl.size = size; | |
3595 | return len; | |
3596 | } | |
3597 | ||
3598 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3599 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3600 | ||
86e6ffdd N |
3601 | static struct attribute *rdev_default_attrs[] = { |
3602 | &rdev_state.attr, | |
4dbcdc75 | 3603 | &rdev_errors.attr, |
014236d2 | 3604 | &rdev_slot.attr, |
93c8cad0 | 3605 | &rdev_offset.attr, |
c6563a8c | 3606 | &rdev_new_offset.attr, |
83303b61 | 3607 | &rdev_size.attr, |
06e3c817 | 3608 | &rdev_recovery_start.attr, |
16c791a5 N |
3609 | &rdev_bad_blocks.attr, |
3610 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3611 | &rdev_ppl_sector.attr, |
3612 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3613 | NULL, |
3614 | }; | |
3615 | static ssize_t | |
3616 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3617 | { | |
3618 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3619 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3620 | |
3621 | if (!entry->show) | |
3622 | return -EIO; | |
758bfc8a | 3623 | if (!rdev->mddev) |
168b305b | 3624 | return -ENODEV; |
758bfc8a | 3625 | return entry->show(rdev, page); |
86e6ffdd N |
3626 | } |
3627 | ||
3628 | static ssize_t | |
3629 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3630 | const char *page, size_t length) | |
3631 | { | |
3632 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3633 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3634 | ssize_t rv; |
fd01b88c | 3635 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3636 | |
3637 | if (!entry->store) | |
3638 | return -EIO; | |
67463acb N |
3639 | if (!capable(CAP_SYS_ADMIN)) |
3640 | return -EACCES; | |
c42d3240 | 3641 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3642 | if (!rv) { |
27c529bb | 3643 | if (rdev->mddev == NULL) |
c42d3240 | 3644 | rv = -ENODEV; |
27c529bb N |
3645 | else |
3646 | rv = entry->store(rdev, page, length); | |
6a51830e | 3647 | mddev_unlock(mddev); |
ca388059 N |
3648 | } |
3649 | return rv; | |
86e6ffdd N |
3650 | } |
3651 | ||
3652 | static void rdev_free(struct kobject *ko) | |
3653 | { | |
3cb03002 | 3654 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3655 | kfree(rdev); |
3656 | } | |
52cf25d0 | 3657 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3658 | .show = rdev_attr_show, |
3659 | .store = rdev_attr_store, | |
3660 | }; | |
3661 | static struct kobj_type rdev_ktype = { | |
3662 | .release = rdev_free, | |
3663 | .sysfs_ops = &rdev_sysfs_ops, | |
3664 | .default_attrs = rdev_default_attrs, | |
3665 | }; | |
3666 | ||
3cb03002 | 3667 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3668 | { |
3669 | rdev->desc_nr = -1; | |
3670 | rdev->saved_raid_disk = -1; | |
3671 | rdev->raid_disk = -1; | |
3672 | rdev->flags = 0; | |
3673 | rdev->data_offset = 0; | |
c6563a8c | 3674 | rdev->new_data_offset = 0; |
e8bb9a83 | 3675 | rdev->sb_events = 0; |
0e3ef49e | 3676 | rdev->last_read_error = 0; |
2699b672 N |
3677 | rdev->sb_loaded = 0; |
3678 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3679 | atomic_set(&rdev->nr_pending, 0); |
3680 | atomic_set(&rdev->read_errors, 0); | |
3681 | atomic_set(&rdev->corrected_errors, 0); | |
3682 | ||
3683 | INIT_LIST_HEAD(&rdev->same_set); | |
3684 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3685 | |
3686 | /* Add space to store bad block list. | |
3687 | * This reserves the space even on arrays where it cannot | |
3688 | * be used - I wonder if that matters | |
3689 | */ | |
fc974ee2 | 3690 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3691 | } |
3692 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3693 | /* |
3694 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3695 | * | |
3696 | * mark the device faulty if: | |
3697 | * | |
3698 | * - the device is nonexistent (zero size) | |
3699 | * - the device has no valid superblock | |
3700 | * | |
3701 | * a faulty rdev _never_ has rdev->sb set. | |
3702 | */ | |
3cb03002 | 3703 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3704 | { |
3705 | char b[BDEVNAME_SIZE]; | |
3706 | int err; | |
3cb03002 | 3707 | struct md_rdev *rdev; |
1da177e4 LT |
3708 | sector_t size; |
3709 | ||
9ffae0cf | 3710 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3711 | if (!rdev) |
1da177e4 | 3712 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3713 | |
2230dfe4 N |
3714 | err = md_rdev_init(rdev); |
3715 | if (err) | |
3716 | goto abort_free; | |
3717 | err = alloc_disk_sb(rdev); | |
3718 | if (err) | |
1da177e4 LT |
3719 | goto abort_free; |
3720 | ||
c5d79adb | 3721 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3722 | if (err) |
3723 | goto abort_free; | |
3724 | ||
f9cb074b | 3725 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3726 | |
77304d2a | 3727 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3728 | if (!size) { |
9d48739e | 3729 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3730 | bdevname(rdev->bdev,b)); |
3731 | err = -EINVAL; | |
3732 | goto abort_free; | |
3733 | } | |
3734 | ||
3735 | if (super_format >= 0) { | |
3736 | err = super_types[super_format]. | |
3737 | load_super(rdev, NULL, super_minor); | |
3738 | if (err == -EINVAL) { | |
9d48739e | 3739 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3740 | bdevname(rdev->bdev,b), |
9d48739e | 3741 | super_format, super_minor); |
1da177e4 LT |
3742 | goto abort_free; |
3743 | } | |
3744 | if (err < 0) { | |
9d48739e | 3745 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3746 | bdevname(rdev->bdev,b)); |
3747 | goto abort_free; | |
3748 | } | |
3749 | } | |
6bfe0b49 | 3750 | |
1da177e4 LT |
3751 | return rdev; |
3752 | ||
3753 | abort_free: | |
2699b672 N |
3754 | if (rdev->bdev) |
3755 | unlock_rdev(rdev); | |
545c8795 | 3756 | md_rdev_clear(rdev); |
1da177e4 LT |
3757 | kfree(rdev); |
3758 | return ERR_PTR(err); | |
3759 | } | |
3760 | ||
3761 | /* | |
3762 | * Check a full RAID array for plausibility | |
3763 | */ | |
3764 | ||
6a5cb53a | 3765 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3766 | { |
3767 | int i; | |
3cb03002 | 3768 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3769 | char b[BDEVNAME_SIZE]; |
3770 | ||
3771 | freshest = NULL; | |
dafb20fa | 3772 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3773 | switch (super_types[mddev->major_version]. |
3774 | load_super(rdev, freshest, mddev->minor_version)) { | |
3775 | case 1: | |
3776 | freshest = rdev; | |
3777 | break; | |
3778 | case 0: | |
3779 | break; | |
3780 | default: | |
9d48739e | 3781 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3782 | bdevname(rdev->bdev,b)); |
fb56dfef | 3783 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3784 | } |
3785 | ||
6a5cb53a YY |
3786 | /* Cannot find a valid fresh disk */ |
3787 | if (!freshest) { | |
3788 | pr_warn("md: cannot find a valid disk\n"); | |
3789 | return -EINVAL; | |
3790 | } | |
3791 | ||
1da177e4 LT |
3792 | super_types[mddev->major_version]. |
3793 | validate_super(mddev, freshest); | |
3794 | ||
3795 | i = 0; | |
dafb20fa | 3796 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3797 | if (mddev->max_disks && |
3798 | (rdev->desc_nr >= mddev->max_disks || | |
3799 | i > mddev->max_disks)) { | |
9d48739e N |
3800 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3801 | mdname(mddev), bdevname(rdev->bdev, b), | |
3802 | mddev->max_disks); | |
fb56dfef | 3803 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3804 | continue; |
3805 | } | |
1aee41f6 | 3806 | if (rdev != freshest) { |
1da177e4 LT |
3807 | if (super_types[mddev->major_version]. |
3808 | validate_super(mddev, rdev)) { | |
9d48739e | 3809 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3810 | bdevname(rdev->bdev,b)); |
fb56dfef | 3811 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3812 | continue; |
3813 | } | |
1aee41f6 | 3814 | } |
1da177e4 LT |
3815 | if (mddev->level == LEVEL_MULTIPATH) { |
3816 | rdev->desc_nr = i++; | |
3817 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3818 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3819 | } else if (rdev->raid_disk >= |
3820 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3821 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3822 | rdev->raid_disk = -1; |
3823 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3824 | } |
3825 | } | |
6a5cb53a YY |
3826 | |
3827 | return 0; | |
1da177e4 LT |
3828 | } |
3829 | ||
72e02075 N |
3830 | /* Read a fixed-point number. |
3831 | * Numbers in sysfs attributes should be in "standard" units where | |
3832 | * possible, so time should be in seconds. | |
f72ffdd6 | 3833 | * However we internally use a a much smaller unit such as |
72e02075 N |
3834 | * milliseconds or jiffies. |
3835 | * This function takes a decimal number with a possible fractional | |
3836 | * component, and produces an integer which is the result of | |
3837 | * multiplying that number by 10^'scale'. | |
3838 | * all without any floating-point arithmetic. | |
3839 | */ | |
3840 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3841 | { | |
3842 | unsigned long result = 0; | |
3843 | long decimals = -1; | |
3844 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3845 | if (*cp == '.') | |
3846 | decimals = 0; | |
3847 | else if (decimals < scale) { | |
3848 | unsigned int value; | |
3849 | value = *cp - '0'; | |
3850 | result = result * 10 + value; | |
3851 | if (decimals >= 0) | |
3852 | decimals++; | |
3853 | } | |
3854 | cp++; | |
3855 | } | |
3856 | if (*cp == '\n') | |
3857 | cp++; | |
3858 | if (*cp) | |
3859 | return -EINVAL; | |
3860 | if (decimals < 0) | |
3861 | decimals = 0; | |
cf891607 | 3862 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3863 | return 0; |
3864 | } | |
3865 | ||
16f17b39 | 3866 | static ssize_t |
fd01b88c | 3867 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3868 | { |
3869 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3870 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3871 | } | |
3872 | static ssize_t | |
fd01b88c | 3873 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3874 | { |
16f17b39 | 3875 | unsigned long msec; |
97ce0a7f | 3876 | |
28c1b9fd | 3877 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3878 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3879 | return -EINVAL; |
3880 | } | |
3881 | ||
72e02075 | 3882 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3883 | return -EINVAL; |
16f17b39 N |
3884 | if (msec == 0) |
3885 | mddev->safemode_delay = 0; | |
3886 | else { | |
19052c0e | 3887 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3888 | unsigned long new_delay = (msec*HZ)/1000; |
3889 | ||
3890 | if (new_delay == 0) | |
3891 | new_delay = 1; | |
3892 | mddev->safemode_delay = new_delay; | |
3893 | if (new_delay < old_delay || old_delay == 0) | |
3894 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3895 | } |
3896 | return len; | |
3897 | } | |
3898 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3899 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3900 | |
eae1701f | 3901 | static ssize_t |
fd01b88c | 3902 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3903 | { |
36d091f4 N |
3904 | struct md_personality *p; |
3905 | int ret; | |
3906 | spin_lock(&mddev->lock); | |
3907 | p = mddev->pers; | |
d9d166c2 | 3908 | if (p) |
36d091f4 | 3909 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3910 | else if (mddev->clevel[0]) |
36d091f4 | 3911 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3912 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3913 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3914 | else |
36d091f4 N |
3915 | ret = 0; |
3916 | spin_unlock(&mddev->lock); | |
3917 | return ret; | |
eae1701f N |
3918 | } |
3919 | ||
d9d166c2 | 3920 | static ssize_t |
fd01b88c | 3921 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3922 | { |
f2859af6 | 3923 | char clevel[16]; |
6791875e N |
3924 | ssize_t rv; |
3925 | size_t slen = len; | |
db721d32 | 3926 | struct md_personality *pers, *oldpers; |
f2859af6 | 3927 | long level; |
db721d32 | 3928 | void *priv, *oldpriv; |
3cb03002 | 3929 | struct md_rdev *rdev; |
245f46c2 | 3930 | |
6791875e N |
3931 | if (slen == 0 || slen >= sizeof(clevel)) |
3932 | return -EINVAL; | |
3933 | ||
3934 | rv = mddev_lock(mddev); | |
3935 | if (rv) | |
3936 | return rv; | |
3937 | ||
245f46c2 | 3938 | if (mddev->pers == NULL) { |
6791875e N |
3939 | strncpy(mddev->clevel, buf, slen); |
3940 | if (mddev->clevel[slen-1] == '\n') | |
3941 | slen--; | |
3942 | mddev->clevel[slen] = 0; | |
245f46c2 | 3943 | mddev->level = LEVEL_NONE; |
6791875e N |
3944 | rv = len; |
3945 | goto out_unlock; | |
245f46c2 | 3946 | } |
6791875e | 3947 | rv = -EROFS; |
bd8839e0 | 3948 | if (mddev->ro) |
6791875e | 3949 | goto out_unlock; |
245f46c2 N |
3950 | |
3951 | /* request to change the personality. Need to ensure: | |
3952 | * - array is not engaged in resync/recovery/reshape | |
3953 | * - old personality can be suspended | |
3954 | * - new personality will access other array. | |
3955 | */ | |
3956 | ||
6791875e | 3957 | rv = -EBUSY; |
bb4f1e9d | 3958 | if (mddev->sync_thread || |
f851b60d | 3959 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3960 | mddev->reshape_position != MaxSector || |
3961 | mddev->sysfs_active) | |
6791875e | 3962 | goto out_unlock; |
245f46c2 | 3963 | |
6791875e | 3964 | rv = -EINVAL; |
245f46c2 | 3965 | if (!mddev->pers->quiesce) { |
9d48739e N |
3966 | pr_warn("md: %s: %s does not support online personality change\n", |
3967 | mdname(mddev), mddev->pers->name); | |
6791875e | 3968 | goto out_unlock; |
245f46c2 N |
3969 | } |
3970 | ||
3971 | /* Now find the new personality */ | |
6791875e N |
3972 | strncpy(clevel, buf, slen); |
3973 | if (clevel[slen-1] == '\n') | |
3974 | slen--; | |
3975 | clevel[slen] = 0; | |
b29bebd6 | 3976 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3977 | level = LEVEL_NONE; |
245f46c2 | 3978 | |
f2859af6 DW |
3979 | if (request_module("md-%s", clevel) != 0) |
3980 | request_module("md-level-%s", clevel); | |
245f46c2 | 3981 | spin_lock(&pers_lock); |
f2859af6 | 3982 | pers = find_pers(level, clevel); |
245f46c2 N |
3983 | if (!pers || !try_module_get(pers->owner)) { |
3984 | spin_unlock(&pers_lock); | |
9d48739e | 3985 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3986 | rv = -EINVAL; |
3987 | goto out_unlock; | |
245f46c2 N |
3988 | } |
3989 | spin_unlock(&pers_lock); | |
3990 | ||
3991 | if (pers == mddev->pers) { | |
3992 | /* Nothing to do! */ | |
3993 | module_put(pers->owner); | |
6791875e N |
3994 | rv = len; |
3995 | goto out_unlock; | |
245f46c2 N |
3996 | } |
3997 | if (!pers->takeover) { | |
3998 | module_put(pers->owner); | |
9d48739e N |
3999 | pr_warn("md: %s: %s does not support personality takeover\n", |
4000 | mdname(mddev), clevel); | |
6791875e N |
4001 | rv = -EINVAL; |
4002 | goto out_unlock; | |
245f46c2 N |
4003 | } |
4004 | ||
dafb20fa | 4005 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
4006 | rdev->new_raid_disk = rdev->raid_disk; |
4007 | ||
245f46c2 N |
4008 | /* ->takeover must set new_* and/or delta_disks |
4009 | * if it succeeds, and may set them when it fails. | |
4010 | */ | |
4011 | priv = pers->takeover(mddev); | |
4012 | if (IS_ERR(priv)) { | |
4013 | mddev->new_level = mddev->level; | |
4014 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4015 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
4016 | mddev->raid_disks -= mddev->delta_disks; |
4017 | mddev->delta_disks = 0; | |
2c810cdd | 4018 | mddev->reshape_backwards = 0; |
245f46c2 | 4019 | module_put(pers->owner); |
9d48739e N |
4020 | pr_warn("md: %s: %s would not accept array\n", |
4021 | mdname(mddev), clevel); | |
6791875e N |
4022 | rv = PTR_ERR(priv); |
4023 | goto out_unlock; | |
245f46c2 N |
4024 | } |
4025 | ||
4026 | /* Looks like we have a winner */ | |
4027 | mddev_suspend(mddev); | |
5aa61f42 | 4028 | mddev_detach(mddev); |
36d091f4 N |
4029 | |
4030 | spin_lock(&mddev->lock); | |
db721d32 N |
4031 | oldpers = mddev->pers; |
4032 | oldpriv = mddev->private; | |
4033 | mddev->pers = pers; | |
4034 | mddev->private = priv; | |
4035 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
4036 | mddev->level = mddev->new_level; | |
4037 | mddev->layout = mddev->new_layout; | |
4038 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
4039 | mddev->delta_disks = 0; | |
4040 | mddev->reshape_backwards = 0; | |
4041 | mddev->degraded = 0; | |
36d091f4 | 4042 | spin_unlock(&mddev->lock); |
db721d32 N |
4043 | |
4044 | if (oldpers->sync_request == NULL && | |
4045 | mddev->external) { | |
4046 | /* We are converting from a no-redundancy array | |
4047 | * to a redundancy array and metadata is managed | |
4048 | * externally so we need to be sure that writes | |
4049 | * won't block due to a need to transition | |
4050 | * clean->dirty | |
4051 | * until external management is started. | |
4052 | */ | |
4053 | mddev->in_sync = 0; | |
4054 | mddev->safemode_delay = 0; | |
4055 | mddev->safemode = 0; | |
4056 | } | |
f72ffdd6 | 4057 | |
db721d32 N |
4058 | oldpers->free(mddev, oldpriv); |
4059 | ||
4060 | if (oldpers->sync_request == NULL && | |
a64c876f N |
4061 | pers->sync_request != NULL) { |
4062 | /* need to add the md_redundancy_group */ | |
4063 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
4064 | pr_warn("md: cannot register extra attributes for %s\n", |
4065 | mdname(mddev)); | |
388975cc | 4066 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 4067 | } |
db721d32 | 4068 | if (oldpers->sync_request != NULL && |
a64c876f N |
4069 | pers->sync_request == NULL) { |
4070 | /* need to remove the md_redundancy_group */ | |
4071 | if (mddev->to_remove == NULL) | |
4072 | mddev->to_remove = &md_redundancy_group; | |
4073 | } | |
4074 | ||
4cb9da7d AO |
4075 | module_put(oldpers->owner); |
4076 | ||
dafb20fa | 4077 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4078 | if (rdev->raid_disk < 0) |
4079 | continue; | |
bf2cb0da | 4080 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
4081 | rdev->new_raid_disk = -1; |
4082 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4083 | continue; | |
36fad858 | 4084 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 4085 | } |
dafb20fa | 4086 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
4087 | if (rdev->raid_disk < 0) |
4088 | continue; | |
4089 | if (rdev->new_raid_disk == rdev->raid_disk) | |
4090 | continue; | |
4091 | rdev->raid_disk = rdev->new_raid_disk; | |
4092 | if (rdev->raid_disk < 0) | |
3a981b03 | 4093 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 4094 | else { |
36fad858 | 4095 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
4096 | pr_warn("md: cannot register rd%d for %s after level change\n", |
4097 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 4098 | } |
e93f68a1 N |
4099 | } |
4100 | ||
db721d32 | 4101 | if (pers->sync_request == NULL) { |
9af204cf TM |
4102 | /* this is now an array without redundancy, so |
4103 | * it must always be in_sync | |
4104 | */ | |
4105 | mddev->in_sync = 1; | |
4106 | del_timer_sync(&mddev->safemode_timer); | |
4107 | } | |
02e5f5c0 | 4108 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 4109 | pers->run(mddev); |
2953079c | 4110 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 4111 | mddev_resume(mddev); |
830778a1 N |
4112 | if (!mddev->thread) |
4113 | md_update_sb(mddev, 1); | |
e1a86dbb | 4114 | sysfs_notify_dirent_safe(mddev->sysfs_level); |
bb7f8d22 | 4115 | md_new_event(mddev); |
6791875e N |
4116 | rv = len; |
4117 | out_unlock: | |
4118 | mddev_unlock(mddev); | |
d9d166c2 N |
4119 | return rv; |
4120 | } | |
4121 | ||
4122 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 4123 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 4124 | |
d4dbd025 | 4125 | static ssize_t |
fd01b88c | 4126 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
4127 | { |
4128 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
4129 | if (mddev->reshape_position != MaxSector && |
4130 | mddev->layout != mddev->new_layout) | |
4131 | return sprintf(page, "%d (%d)\n", | |
4132 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4133 | return sprintf(page, "%d\n", mddev->layout); |
4134 | } | |
4135 | ||
4136 | static ssize_t | |
fd01b88c | 4137 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4138 | { |
4c9309c0 | 4139 | unsigned int n; |
6791875e | 4140 | int err; |
d4dbd025 | 4141 | |
4c9309c0 AD |
4142 | err = kstrtouint(buf, 10, &n); |
4143 | if (err < 0) | |
4144 | return err; | |
6791875e N |
4145 | err = mddev_lock(mddev); |
4146 | if (err) | |
4147 | return err; | |
d4dbd025 | 4148 | |
b3546035 | 4149 | if (mddev->pers) { |
50ac168a | 4150 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4151 | err = -EBUSY; |
4152 | else if (mddev->ro) | |
4153 | err = -EROFS; | |
4154 | else { | |
4155 | mddev->new_layout = n; | |
4156 | err = mddev->pers->check_reshape(mddev); | |
4157 | if (err) | |
4158 | mddev->new_layout = mddev->layout; | |
597a711b | 4159 | } |
b3546035 | 4160 | } else { |
08a02ecd | 4161 | mddev->new_layout = n; |
b3546035 N |
4162 | if (mddev->reshape_position == MaxSector) |
4163 | mddev->layout = n; | |
4164 | } | |
6791875e N |
4165 | mddev_unlock(mddev); |
4166 | return err ?: len; | |
d4dbd025 N |
4167 | } |
4168 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4169 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4170 | |
eae1701f | 4171 | static ssize_t |
fd01b88c | 4172 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4173 | { |
bb636547 N |
4174 | if (mddev->raid_disks == 0) |
4175 | return 0; | |
08a02ecd N |
4176 | if (mddev->reshape_position != MaxSector && |
4177 | mddev->delta_disks != 0) | |
4178 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4179 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4180 | return sprintf(page, "%d\n", mddev->raid_disks); |
4181 | } | |
4182 | ||
fd01b88c | 4183 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4184 | |
4185 | static ssize_t | |
fd01b88c | 4186 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4187 | { |
4c9309c0 | 4188 | unsigned int n; |
6791875e | 4189 | int err; |
da943b99 | 4190 | |
4c9309c0 AD |
4191 | err = kstrtouint(buf, 10, &n); |
4192 | if (err < 0) | |
4193 | return err; | |
da943b99 | 4194 | |
6791875e N |
4195 | err = mddev_lock(mddev); |
4196 | if (err) | |
4197 | return err; | |
da943b99 | 4198 | if (mddev->pers) |
6791875e | 4199 | err = update_raid_disks(mddev, n); |
08a02ecd | 4200 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4201 | struct md_rdev *rdev; |
08a02ecd | 4202 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4203 | |
6791875e | 4204 | err = -EINVAL; |
c6563a8c N |
4205 | rdev_for_each(rdev, mddev) { |
4206 | if (olddisks < n && | |
4207 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4208 | goto out_unlock; |
c6563a8c N |
4209 | if (olddisks > n && |
4210 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4211 | goto out_unlock; |
c6563a8c | 4212 | } |
6791875e | 4213 | err = 0; |
08a02ecd N |
4214 | mddev->delta_disks = n - olddisks; |
4215 | mddev->raid_disks = n; | |
2c810cdd | 4216 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4217 | } else |
da943b99 | 4218 | mddev->raid_disks = n; |
6791875e N |
4219 | out_unlock: |
4220 | mddev_unlock(mddev); | |
4221 | return err ? err : len; | |
da943b99 N |
4222 | } |
4223 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4224 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4225 | |
3b34380a | 4226 | static ssize_t |
fd01b88c | 4227 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4228 | { |
08a02ecd | 4229 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4230 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4231 | return sprintf(page, "%d (%d)\n", | |
4232 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4233 | mddev->chunk_sectors << 9); |
4234 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4235 | } |
4236 | ||
4237 | static ssize_t | |
fd01b88c | 4238 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4239 | { |
4c9309c0 | 4240 | unsigned long n; |
6791875e | 4241 | int err; |
3b34380a | 4242 | |
4c9309c0 AD |
4243 | err = kstrtoul(buf, 10, &n); |
4244 | if (err < 0) | |
4245 | return err; | |
3b34380a | 4246 | |
6791875e N |
4247 | err = mddev_lock(mddev); |
4248 | if (err) | |
4249 | return err; | |
b3546035 | 4250 | if (mddev->pers) { |
50ac168a | 4251 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4252 | err = -EBUSY; |
4253 | else if (mddev->ro) | |
4254 | err = -EROFS; | |
4255 | else { | |
4256 | mddev->new_chunk_sectors = n >> 9; | |
4257 | err = mddev->pers->check_reshape(mddev); | |
4258 | if (err) | |
4259 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4260 | } |
b3546035 | 4261 | } else { |
664e7c41 | 4262 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4263 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4264 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4265 | } |
6791875e N |
4266 | mddev_unlock(mddev); |
4267 | return err ?: len; | |
3b34380a N |
4268 | } |
4269 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4270 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4271 | |
a94213b1 | 4272 | static ssize_t |
fd01b88c | 4273 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4274 | { |
d1a7c503 N |
4275 | if (mddev->recovery_cp == MaxSector) |
4276 | return sprintf(page, "none\n"); | |
a94213b1 N |
4277 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4278 | } | |
4279 | ||
4280 | static ssize_t | |
fd01b88c | 4281 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4282 | { |
4c9309c0 | 4283 | unsigned long long n; |
6791875e | 4284 | int err; |
4c9309c0 AD |
4285 | |
4286 | if (cmd_match(buf, "none")) | |
4287 | n = MaxSector; | |
4288 | else { | |
4289 | err = kstrtoull(buf, 10, &n); | |
4290 | if (err < 0) | |
4291 | return err; | |
4292 | if (n != (sector_t)n) | |
4293 | return -EINVAL; | |
4294 | } | |
a94213b1 | 4295 | |
6791875e N |
4296 | err = mddev_lock(mddev); |
4297 | if (err) | |
4298 | return err; | |
b098636c | 4299 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4300 | err = -EBUSY; |
a94213b1 | 4301 | |
6791875e N |
4302 | if (!err) { |
4303 | mddev->recovery_cp = n; | |
4304 | if (mddev->pers) | |
2953079c | 4305 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4306 | } |
4307 | mddev_unlock(mddev); | |
4308 | return err ?: len; | |
a94213b1 N |
4309 | } |
4310 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4311 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4312 | resync_start_show, resync_start_store); | |
a94213b1 | 4313 | |
9e653b63 N |
4314 | /* |
4315 | * The array state can be: | |
4316 | * | |
4317 | * clear | |
4318 | * No devices, no size, no level | |
4319 | * Equivalent to STOP_ARRAY ioctl | |
4320 | * inactive | |
4321 | * May have some settings, but array is not active | |
4322 | * all IO results in error | |
4323 | * When written, doesn't tear down array, but just stops it | |
4324 | * suspended (not supported yet) | |
4325 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4326 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4327 | * readonly |
4328 | * no resync can happen. no superblocks get written. | |
4329 | * write requests fail | |
4330 | * read-auto | |
4331 | * like readonly, but behaves like 'clean' on a write request. | |
4332 | * | |
4333 | * clean - no pending writes, but otherwise active. | |
4334 | * When written to inactive array, starts without resync | |
4335 | * If a write request arrives then | |
4336 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4337 | * if not known, block and switch to write-pending | |
4338 | * If written to an active array that has pending writes, then fails. | |
4339 | * active | |
4340 | * fully active: IO and resync can be happening. | |
4341 | * When written to inactive array, starts with resync | |
4342 | * | |
4343 | * write-pending | |
4344 | * clean, but writes are blocked waiting for 'active' to be written. | |
4345 | * | |
4346 | * active-idle | |
4347 | * like active, but no writes have been seen for a while (100msec). | |
4348 | * | |
62f7b198 GP |
4349 | * broken |
4350 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4351 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4352 | * when a member is gone, so this state will at least alert the | |
4353 | * user that something is wrong. | |
9e653b63 N |
4354 | */ |
4355 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4356 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4357 | static char *array_states[] = { |
9e653b63 | 4358 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4359 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4360 | |
4361 | static int match_word(const char *word, char **list) | |
4362 | { | |
4363 | int n; | |
4364 | for (n=0; list[n]; n++) | |
4365 | if (cmd_match(word, list[n])) | |
4366 | break; | |
4367 | return n; | |
4368 | } | |
4369 | ||
4370 | static ssize_t | |
fd01b88c | 4371 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4372 | { |
4373 | enum array_state st = inactive; | |
4374 | ||
62f7b198 | 4375 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4376 | switch(mddev->ro) { |
4377 | case 1: | |
4378 | st = readonly; | |
4379 | break; | |
4380 | case 2: | |
4381 | st = read_auto; | |
4382 | break; | |
4383 | case 0: | |
55cc39f3 | 4384 | spin_lock(&mddev->lock); |
2953079c | 4385 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4386 | st = write_pending; |
16f88949 TM |
4387 | else if (mddev->in_sync) |
4388 | st = clean; | |
9e653b63 N |
4389 | else if (mddev->safemode) |
4390 | st = active_idle; | |
4391 | else | |
4392 | st = active; | |
55cc39f3 | 4393 | spin_unlock(&mddev->lock); |
9e653b63 | 4394 | } |
62f7b198 GP |
4395 | |
4396 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4397 | st = broken; | |
4398 | } else { | |
9e653b63 N |
4399 | if (list_empty(&mddev->disks) && |
4400 | mddev->raid_disks == 0 && | |
58c0fed4 | 4401 | mddev->dev_sectors == 0) |
9e653b63 N |
4402 | st = clear; |
4403 | else | |
4404 | st = inactive; | |
4405 | } | |
4406 | return sprintf(page, "%s\n", array_states[st]); | |
4407 | } | |
4408 | ||
f72ffdd6 N |
4409 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4410 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4411 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4412 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4413 | |
4414 | static ssize_t | |
fd01b88c | 4415 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4416 | { |
6497709b | 4417 | int err = 0; |
9e653b63 | 4418 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4419 | |
4420 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4421 | /* don't take reconfig_mutex when toggling between | |
4422 | * clean and active | |
4423 | */ | |
4424 | spin_lock(&mddev->lock); | |
4425 | if (st == active) { | |
4426 | restart_array(mddev); | |
2953079c | 4427 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4428 | md_wakeup_thread(mddev->thread); |
6791875e | 4429 | wake_up(&mddev->sb_wait); |
6791875e N |
4430 | } else /* st == clean */ { |
4431 | restart_array(mddev); | |
6497709b | 4432 | if (!set_in_sync(mddev)) |
6791875e N |
4433 | err = -EBUSY; |
4434 | } | |
573275b5 TM |
4435 | if (!err) |
4436 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4437 | spin_unlock(&mddev->lock); |
c008f1d3 | 4438 | return err ?: len; |
6791875e N |
4439 | } |
4440 | err = mddev_lock(mddev); | |
4441 | if (err) | |
4442 | return err; | |
4443 | err = -EINVAL; | |
9e653b63 N |
4444 | switch(st) { |
4445 | case bad_word: | |
4446 | break; | |
4447 | case clear: | |
4448 | /* stopping an active array */ | |
a05b7ea0 | 4449 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4450 | break; |
4451 | case inactive: | |
4452 | /* stopping an active array */ | |
90cf195d | 4453 | if (mddev->pers) |
a05b7ea0 | 4454 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4455 | else |
e691063a | 4456 | err = 0; /* already inactive */ |
9e653b63 N |
4457 | break; |
4458 | case suspended: | |
4459 | break; /* not supported yet */ | |
4460 | case readonly: | |
4461 | if (mddev->pers) | |
a05b7ea0 | 4462 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4463 | else { |
4464 | mddev->ro = 1; | |
648b629e | 4465 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4466 | err = do_md_run(mddev); |
4467 | } | |
4468 | break; | |
4469 | case read_auto: | |
9e653b63 | 4470 | if (mddev->pers) { |
80268ee9 | 4471 | if (mddev->ro == 0) |
a05b7ea0 | 4472 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4473 | else if (mddev->ro == 1) |
648b629e N |
4474 | err = restart_array(mddev); |
4475 | if (err == 0) { | |
4476 | mddev->ro = 2; | |
4477 | set_disk_ro(mddev->gendisk, 0); | |
4478 | } | |
9e653b63 N |
4479 | } else { |
4480 | mddev->ro = 2; | |
4481 | err = do_md_run(mddev); | |
4482 | } | |
4483 | break; | |
4484 | case clean: | |
4485 | if (mddev->pers) { | |
339421de SL |
4486 | err = restart_array(mddev); |
4487 | if (err) | |
4488 | break; | |
85572d7c | 4489 | spin_lock(&mddev->lock); |
6497709b | 4490 | if (!set_in_sync(mddev)) |
e691063a | 4491 | err = -EBUSY; |
85572d7c | 4492 | spin_unlock(&mddev->lock); |
5bf29597 N |
4493 | } else |
4494 | err = -EINVAL; | |
9e653b63 N |
4495 | break; |
4496 | case active: | |
4497 | if (mddev->pers) { | |
339421de SL |
4498 | err = restart_array(mddev); |
4499 | if (err) | |
4500 | break; | |
2953079c | 4501 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4502 | wake_up(&mddev->sb_wait); |
4503 | err = 0; | |
4504 | } else { | |
4505 | mddev->ro = 0; | |
648b629e | 4506 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4507 | err = do_md_run(mddev); |
4508 | } | |
4509 | break; | |
4510 | case write_pending: | |
4511 | case active_idle: | |
62f7b198 | 4512 | case broken: |
9e653b63 N |
4513 | /* these cannot be set */ |
4514 | break; | |
4515 | } | |
6791875e N |
4516 | |
4517 | if (!err) { | |
1d23f178 N |
4518 | if (mddev->hold_active == UNTIL_IOCTL) |
4519 | mddev->hold_active = 0; | |
00bcb4ac | 4520 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4521 | } |
6791875e N |
4522 | mddev_unlock(mddev); |
4523 | return err ?: len; | |
9e653b63 | 4524 | } |
80ca3a44 | 4525 | static struct md_sysfs_entry md_array_state = |
750f199e | 4526 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4527 | |
1e50915f | 4528 | static ssize_t |
fd01b88c | 4529 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4530 | return sprintf(page, "%d\n", |
4531 | atomic_read(&mddev->max_corr_read_errors)); | |
4532 | } | |
4533 | ||
4534 | static ssize_t | |
fd01b88c | 4535 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4536 | { |
4c9309c0 AD |
4537 | unsigned int n; |
4538 | int rv; | |
1e50915f | 4539 | |
4c9309c0 AD |
4540 | rv = kstrtouint(buf, 10, &n); |
4541 | if (rv < 0) | |
4542 | return rv; | |
4543 | atomic_set(&mddev->max_corr_read_errors, n); | |
4544 | return len; | |
1e50915f RB |
4545 | } |
4546 | ||
4547 | static struct md_sysfs_entry max_corr_read_errors = | |
4548 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4549 | max_corrected_read_errors_store); | |
4550 | ||
6d7ff738 | 4551 | static ssize_t |
fd01b88c | 4552 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4553 | { |
4554 | return -EINVAL; | |
4555 | } | |
4556 | ||
cc1ffe61 GJ |
4557 | /* need to ensure rdev_delayed_delete() has completed */ |
4558 | static void flush_rdev_wq(struct mddev *mddev) | |
4559 | { | |
4560 | struct md_rdev *rdev; | |
4561 | ||
4562 | rcu_read_lock(); | |
4563 | rdev_for_each_rcu(rdev, mddev) | |
4564 | if (work_pending(&rdev->del_work)) { | |
4565 | flush_workqueue(md_rdev_misc_wq); | |
4566 | break; | |
4567 | } | |
4568 | rcu_read_unlock(); | |
4569 | } | |
4570 | ||
6d7ff738 | 4571 | static ssize_t |
fd01b88c | 4572 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4573 | { |
4574 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4575 | /* The new device is added to the array. | |
4576 | * If the array has a persistent superblock, we read the | |
4577 | * superblock to initialise info and check validity. | |
4578 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4579 | * which mainly checks size. | |
4580 | */ | |
4581 | char *e; | |
4582 | int major = simple_strtoul(buf, &e, 10); | |
4583 | int minor; | |
4584 | dev_t dev; | |
3cb03002 | 4585 | struct md_rdev *rdev; |
6d7ff738 N |
4586 | int err; |
4587 | ||
4588 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4589 | return -EINVAL; | |
4590 | minor = simple_strtoul(e+1, &e, 10); | |
4591 | if (*e && *e != '\n') | |
4592 | return -EINVAL; | |
4593 | dev = MKDEV(major, minor); | |
4594 | if (major != MAJOR(dev) || | |
4595 | minor != MINOR(dev)) | |
4596 | return -EOVERFLOW; | |
4597 | ||
cc1ffe61 | 4598 | flush_rdev_wq(mddev); |
6791875e N |
4599 | err = mddev_lock(mddev); |
4600 | if (err) | |
4601 | return err; | |
6d7ff738 N |
4602 | if (mddev->persistent) { |
4603 | rdev = md_import_device(dev, mddev->major_version, | |
4604 | mddev->minor_version); | |
4605 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4606 | struct md_rdev *rdev0 |
4607 | = list_entry(mddev->disks.next, | |
4608 | struct md_rdev, same_set); | |
6d7ff738 N |
4609 | err = super_types[mddev->major_version] |
4610 | .load_super(rdev, rdev0, mddev->minor_version); | |
4611 | if (err < 0) | |
4612 | goto out; | |
4613 | } | |
c5d79adb N |
4614 | } else if (mddev->external) |
4615 | rdev = md_import_device(dev, -2, -1); | |
4616 | else | |
6d7ff738 N |
4617 | rdev = md_import_device(dev, -1, -1); |
4618 | ||
9a8c0fa8 N |
4619 | if (IS_ERR(rdev)) { |
4620 | mddev_unlock(mddev); | |
6d7ff738 | 4621 | return PTR_ERR(rdev); |
9a8c0fa8 | 4622 | } |
6d7ff738 N |
4623 | err = bind_rdev_to_array(rdev, mddev); |
4624 | out: | |
4625 | if (err) | |
4626 | export_rdev(rdev); | |
6791875e | 4627 | mddev_unlock(mddev); |
5492c46e AO |
4628 | if (!err) |
4629 | md_new_event(mddev); | |
6d7ff738 N |
4630 | return err ? err : len; |
4631 | } | |
4632 | ||
4633 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4634 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4635 | |
9b1d1dac | 4636 | static ssize_t |
fd01b88c | 4637 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4638 | { |
4639 | char *end; | |
4640 | unsigned long chunk, end_chunk; | |
6791875e | 4641 | int err; |
9b1d1dac | 4642 | |
6791875e N |
4643 | err = mddev_lock(mddev); |
4644 | if (err) | |
4645 | return err; | |
9b1d1dac PC |
4646 | if (!mddev->bitmap) |
4647 | goto out; | |
4648 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4649 | while (*buf) { | |
4650 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4651 | if (buf == end) break; | |
4652 | if (*end == '-') { /* range */ | |
4653 | buf = end + 1; | |
4654 | end_chunk = simple_strtoul(buf, &end, 0); | |
4655 | if (buf == end) break; | |
4656 | } | |
4657 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4658 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4659 | buf = skip_spaces(end); |
9b1d1dac | 4660 | } |
e64e4018 | 4661 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4662 | out: |
6791875e | 4663 | mddev_unlock(mddev); |
9b1d1dac PC |
4664 | return len; |
4665 | } | |
4666 | ||
4667 | static struct md_sysfs_entry md_bitmap = | |
4668 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4669 | ||
a35b0d69 | 4670 | static ssize_t |
fd01b88c | 4671 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4672 | { |
58c0fed4 AN |
4673 | return sprintf(page, "%llu\n", |
4674 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4675 | } |
4676 | ||
fd01b88c | 4677 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4678 | |
4679 | static ssize_t | |
fd01b88c | 4680 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4681 | { |
4682 | /* If array is inactive, we can reduce the component size, but | |
4683 | * not increase it (except from 0). | |
4684 | * If array is active, we can try an on-line resize | |
4685 | */ | |
b522adcd DW |
4686 | sector_t sectors; |
4687 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4688 | |
58c0fed4 AN |
4689 | if (err < 0) |
4690 | return err; | |
6791875e N |
4691 | err = mddev_lock(mddev); |
4692 | if (err) | |
4693 | return err; | |
a35b0d69 | 4694 | if (mddev->pers) { |
58c0fed4 | 4695 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4696 | if (err == 0) |
4697 | md_update_sb(mddev, 1); | |
a35b0d69 | 4698 | } else { |
58c0fed4 AN |
4699 | if (mddev->dev_sectors == 0 || |
4700 | mddev->dev_sectors > sectors) | |
4701 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4702 | else |
4703 | err = -ENOSPC; | |
4704 | } | |
6791875e | 4705 | mddev_unlock(mddev); |
a35b0d69 N |
4706 | return err ? err : len; |
4707 | } | |
4708 | ||
4709 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4710 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4711 | |
83f0d77a | 4712 | /* Metadata version. |
e691063a N |
4713 | * This is one of |
4714 | * 'none' for arrays with no metadata (good luck...) | |
4715 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4716 | * or N.M for internally known formats |
4717 | */ | |
4718 | static ssize_t | |
fd01b88c | 4719 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4720 | { |
4721 | if (mddev->persistent) | |
4722 | return sprintf(page, "%d.%d\n", | |
4723 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4724 | else if (mddev->external) |
4725 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4726 | else |
4727 | return sprintf(page, "none\n"); | |
4728 | } | |
4729 | ||
4730 | static ssize_t | |
fd01b88c | 4731 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4732 | { |
4733 | int major, minor; | |
4734 | char *e; | |
6791875e | 4735 | int err; |
ea43ddd8 N |
4736 | /* Changing the details of 'external' metadata is |
4737 | * always permitted. Otherwise there must be | |
4738 | * no devices attached to the array. | |
4739 | */ | |
6791875e N |
4740 | |
4741 | err = mddev_lock(mddev); | |
4742 | if (err) | |
4743 | return err; | |
4744 | err = -EBUSY; | |
ea43ddd8 N |
4745 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4746 | ; | |
4747 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4748 | goto out_unlock; |
8bb93aac | 4749 | |
6791875e | 4750 | err = 0; |
8bb93aac N |
4751 | if (cmd_match(buf, "none")) { |
4752 | mddev->persistent = 0; | |
e691063a N |
4753 | mddev->external = 0; |
4754 | mddev->major_version = 0; | |
4755 | mddev->minor_version = 90; | |
6791875e | 4756 | goto out_unlock; |
e691063a N |
4757 | } |
4758 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4759 | size_t namelen = len-9; |
e691063a N |
4760 | if (namelen >= sizeof(mddev->metadata_type)) |
4761 | namelen = sizeof(mddev->metadata_type)-1; | |
4762 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4763 | mddev->metadata_type[namelen] = 0; | |
4764 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4765 | mddev->metadata_type[--namelen] = 0; | |
4766 | mddev->persistent = 0; | |
4767 | mddev->external = 1; | |
8bb93aac N |
4768 | mddev->major_version = 0; |
4769 | mddev->minor_version = 90; | |
6791875e | 4770 | goto out_unlock; |
8bb93aac N |
4771 | } |
4772 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4773 | err = -EINVAL; |
8bb93aac | 4774 | if (e==buf || *e != '.') |
6791875e | 4775 | goto out_unlock; |
8bb93aac N |
4776 | buf = e+1; |
4777 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4778 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4779 | goto out_unlock; |
4780 | err = -ENOENT; | |
50511da3 | 4781 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4782 | goto out_unlock; |
8bb93aac N |
4783 | mddev->major_version = major; |
4784 | mddev->minor_version = minor; | |
4785 | mddev->persistent = 1; | |
e691063a | 4786 | mddev->external = 0; |
6791875e N |
4787 | err = 0; |
4788 | out_unlock: | |
4789 | mddev_unlock(mddev); | |
4790 | return err ?: len; | |
8bb93aac N |
4791 | } |
4792 | ||
4793 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4794 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4795 | |
24dd469d | 4796 | static ssize_t |
fd01b88c | 4797 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4798 | { |
7eec314d | 4799 | char *type = "idle"; |
b7b17c9b N |
4800 | unsigned long recovery = mddev->recovery; |
4801 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4802 | type = "frozen"; |
b7b17c9b N |
4803 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4804 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4805 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4806 | type = "reshape"; |
b7b17c9b N |
4807 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4808 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4809 | type = "resync"; |
b7b17c9b | 4810 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4811 | type = "check"; |
4812 | else | |
4813 | type = "repair"; | |
b7b17c9b | 4814 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4815 | type = "recover"; |
985ca973 N |
4816 | else if (mddev->reshape_position != MaxSector) |
4817 | type = "reshape"; | |
24dd469d N |
4818 | } |
4819 | return sprintf(page, "%s\n", type); | |
4820 | } | |
4821 | ||
4822 | static ssize_t | |
fd01b88c | 4823 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4824 | { |
7eec314d N |
4825 | if (!mddev->pers || !mddev->pers->sync_request) |
4826 | return -EINVAL; | |
4827 | ||
b6a9ce68 N |
4828 | |
4829 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4830 | if (cmd_match(page, "frozen")) |
4831 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4832 | else | |
4833 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4834 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4835 | mddev_lock(mddev) == 0) { | |
cc1ffe61 GJ |
4836 | if (work_pending(&mddev->del_work)) |
4837 | flush_workqueue(md_misc_wq); | |
8e8e2518 N |
4838 | if (mddev->sync_thread) { |
4839 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4840 | md_reap_sync_thread(mddev); |
6791875e | 4841 | } |
8e8e2518 | 4842 | mddev_unlock(mddev); |
7eec314d | 4843 | } |
312045ee | 4844 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4845 | return -EBUSY; |
72a23c21 | 4846 | else if (cmd_match(page, "resync")) |
56ccc112 | 4847 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4848 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4849 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4850 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4851 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4852 | int err; |
4853 | if (mddev->pers->start_reshape == NULL) | |
4854 | return -EINVAL; | |
6791875e N |
4855 | err = mddev_lock(mddev); |
4856 | if (!err) { | |
312045ee N |
4857 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4858 | err = -EBUSY; | |
4859 | else { | |
4860 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4861 | err = mddev->pers->start_reshape(mddev); | |
4862 | } | |
6791875e N |
4863 | mddev_unlock(mddev); |
4864 | } | |
16484bf5 N |
4865 | if (err) |
4866 | return err; | |
e1a86dbb | 4867 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
16484bf5 | 4868 | } else { |
bce74dac | 4869 | if (cmd_match(page, "check")) |
7eec314d | 4870 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4871 | else if (!cmd_match(page, "repair")) |
7eec314d | 4872 | return -EINVAL; |
56ccc112 | 4873 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4874 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4875 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4876 | } |
48c26ddc N |
4877 | if (mddev->ro == 2) { |
4878 | /* A write to sync_action is enough to justify | |
4879 | * canceling read-auto mode | |
4880 | */ | |
4881 | mddev->ro = 0; | |
4882 | md_wakeup_thread(mddev->sync_thread); | |
4883 | } | |
03c902e1 | 4884 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4885 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4886 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4887 | return len; |
4888 | } | |
4889 | ||
c4a39551 | 4890 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4891 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4892 | |
4893 | static ssize_t | |
4894 | last_sync_action_show(struct mddev *mddev, char *page) | |
4895 | { | |
4896 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4897 | } | |
4898 | ||
4899 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4900 | ||
9d88883e | 4901 | static ssize_t |
fd01b88c | 4902 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4903 | { |
4904 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4905 | (unsigned long long) |
4906 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4907 | } |
4908 | ||
80ca3a44 | 4909 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4910 | |
88202a0c | 4911 | static ssize_t |
fd01b88c | 4912 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4913 | { |
4914 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4915 | mddev->sync_speed_min ? "local": "system"); | |
4916 | } | |
4917 | ||
4918 | static ssize_t | |
fd01b88c | 4919 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4920 | { |
4c9309c0 AD |
4921 | unsigned int min; |
4922 | int rv; | |
4923 | ||
88202a0c | 4924 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4925 | min = 0; |
4926 | } else { | |
4927 | rv = kstrtouint(buf, 10, &min); | |
4928 | if (rv < 0) | |
4929 | return rv; | |
4930 | if (min == 0) | |
4931 | return -EINVAL; | |
88202a0c | 4932 | } |
88202a0c N |
4933 | mddev->sync_speed_min = min; |
4934 | return len; | |
4935 | } | |
4936 | ||
4937 | static struct md_sysfs_entry md_sync_min = | |
4938 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4939 | ||
4940 | static ssize_t | |
fd01b88c | 4941 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4942 | { |
4943 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4944 | mddev->sync_speed_max ? "local": "system"); | |
4945 | } | |
4946 | ||
4947 | static ssize_t | |
fd01b88c | 4948 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4949 | { |
4c9309c0 AD |
4950 | unsigned int max; |
4951 | int rv; | |
4952 | ||
88202a0c | 4953 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4954 | max = 0; |
4955 | } else { | |
4956 | rv = kstrtouint(buf, 10, &max); | |
4957 | if (rv < 0) | |
4958 | return rv; | |
4959 | if (max == 0) | |
4960 | return -EINVAL; | |
88202a0c | 4961 | } |
88202a0c N |
4962 | mddev->sync_speed_max = max; |
4963 | return len; | |
4964 | } | |
4965 | ||
4966 | static struct md_sysfs_entry md_sync_max = | |
4967 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4968 | ||
d7f3d291 | 4969 | static ssize_t |
fd01b88c | 4970 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4971 | { |
4972 | return sprintf(page, "%d\n", mddev->degraded); | |
4973 | } | |
4974 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4975 | |
90b08710 | 4976 | static ssize_t |
fd01b88c | 4977 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4978 | { |
4979 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4980 | } | |
4981 | ||
4982 | static ssize_t | |
fd01b88c | 4983 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4984 | { |
4985 | long n; | |
4986 | ||
b29bebd6 | 4987 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4988 | return -EINVAL; |
4989 | ||
4990 | if (n != 0 && n != 1) | |
4991 | return -EINVAL; | |
4992 | ||
4993 | mddev->parallel_resync = n; | |
4994 | ||
4995 | if (mddev->sync_thread) | |
4996 | wake_up(&resync_wait); | |
4997 | ||
4998 | return len; | |
4999 | } | |
5000 | ||
5001 | /* force parallel resync, even with shared block devices */ | |
5002 | static struct md_sysfs_entry md_sync_force_parallel = | |
5003 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
5004 | sync_force_parallel_show, sync_force_parallel_store); | |
5005 | ||
88202a0c | 5006 | static ssize_t |
fd01b88c | 5007 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
5008 | { |
5009 | unsigned long resync, dt, db; | |
d1a7c503 N |
5010 | if (mddev->curr_resync == 0) |
5011 | return sprintf(page, "none\n"); | |
9687a60c AN |
5012 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
5013 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 5014 | if (!dt) dt++; |
9687a60c AN |
5015 | db = resync - mddev->resync_mark_cnt; |
5016 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
5017 | } |
5018 | ||
80ca3a44 | 5019 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
5020 | |
5021 | static ssize_t | |
fd01b88c | 5022 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 5023 | { |
13ae864b | 5024 | unsigned long long max_sectors, resync; |
88202a0c | 5025 | |
acb180b0 N |
5026 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
5027 | return sprintf(page, "none\n"); | |
5028 | ||
72f36d59 N |
5029 | if (mddev->curr_resync == 1 || |
5030 | mddev->curr_resync == 2) | |
5031 | return sprintf(page, "delayed\n"); | |
5032 | ||
c804cdec N |
5033 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
5034 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 5035 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 5036 | else |
58c0fed4 | 5037 | max_sectors = mddev->dev_sectors; |
88202a0c | 5038 | |
acb180b0 | 5039 | resync = mddev->curr_resync_completed; |
13ae864b | 5040 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
5041 | } |
5042 | ||
750f199e N |
5043 | static struct md_sysfs_entry md_sync_completed = |
5044 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 5045 | |
5e96ee65 | 5046 | static ssize_t |
fd01b88c | 5047 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
5048 | { |
5049 | return sprintf(page, "%llu\n", | |
5050 | (unsigned long long)mddev->resync_min); | |
5051 | } | |
5052 | static ssize_t | |
fd01b88c | 5053 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
5054 | { |
5055 | unsigned long long min; | |
23da422b | 5056 | int err; |
23da422b | 5057 | |
b29bebd6 | 5058 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 5059 | return -EINVAL; |
23da422b N |
5060 | |
5061 | spin_lock(&mddev->lock); | |
5062 | err = -EINVAL; | |
5e96ee65 | 5063 | if (min > mddev->resync_max) |
23da422b N |
5064 | goto out_unlock; |
5065 | ||
5066 | err = -EBUSY; | |
5e96ee65 | 5067 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5068 | goto out_unlock; |
5e96ee65 | 5069 | |
50c37b13 N |
5070 | /* Round down to multiple of 4K for safety */ |
5071 | mddev->resync_min = round_down(min, 8); | |
23da422b | 5072 | err = 0; |
5e96ee65 | 5073 | |
23da422b N |
5074 | out_unlock: |
5075 | spin_unlock(&mddev->lock); | |
5076 | return err ?: len; | |
5e96ee65 NB |
5077 | } |
5078 | ||
5079 | static struct md_sysfs_entry md_min_sync = | |
5080 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
5081 | ||
c6207277 | 5082 | static ssize_t |
fd01b88c | 5083 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
5084 | { |
5085 | if (mddev->resync_max == MaxSector) | |
5086 | return sprintf(page, "max\n"); | |
5087 | else | |
5088 | return sprintf(page, "%llu\n", | |
5089 | (unsigned long long)mddev->resync_max); | |
5090 | } | |
5091 | static ssize_t | |
fd01b88c | 5092 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 5093 | { |
23da422b N |
5094 | int err; |
5095 | spin_lock(&mddev->lock); | |
c6207277 N |
5096 | if (strncmp(buf, "max", 3) == 0) |
5097 | mddev->resync_max = MaxSector; | |
5098 | else { | |
5e96ee65 | 5099 | unsigned long long max; |
23da422b N |
5100 | int chunk; |
5101 | ||
5102 | err = -EINVAL; | |
b29bebd6 | 5103 | if (kstrtoull(buf, 10, &max)) |
23da422b | 5104 | goto out_unlock; |
5e96ee65 | 5105 | if (max < mddev->resync_min) |
23da422b N |
5106 | goto out_unlock; |
5107 | ||
5108 | err = -EBUSY; | |
c6207277 | 5109 | if (max < mddev->resync_max && |
4d484a4a | 5110 | mddev->ro == 0 && |
c6207277 | 5111 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 5112 | goto out_unlock; |
c6207277 N |
5113 | |
5114 | /* Must be a multiple of chunk_size */ | |
23da422b N |
5115 | chunk = mddev->chunk_sectors; |
5116 | if (chunk) { | |
2ac06c33 | 5117 | sector_t temp = max; |
23da422b N |
5118 | |
5119 | err = -EINVAL; | |
5120 | if (sector_div(temp, chunk)) | |
5121 | goto out_unlock; | |
c6207277 N |
5122 | } |
5123 | mddev->resync_max = max; | |
5124 | } | |
5125 | wake_up(&mddev->recovery_wait); | |
23da422b N |
5126 | err = 0; |
5127 | out_unlock: | |
5128 | spin_unlock(&mddev->lock); | |
5129 | return err ?: len; | |
c6207277 N |
5130 | } |
5131 | ||
5132 | static struct md_sysfs_entry md_max_sync = | |
5133 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
5134 | ||
e464eafd | 5135 | static ssize_t |
fd01b88c | 5136 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
5137 | { |
5138 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
5139 | } | |
5140 | ||
5141 | static ssize_t | |
fd01b88c | 5142 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5143 | { |
b03e0ccb | 5144 | unsigned long long new; |
6791875e | 5145 | int err; |
e464eafd | 5146 | |
4c9309c0 AD |
5147 | err = kstrtoull(buf, 10, &new); |
5148 | if (err < 0) | |
5149 | return err; | |
5150 | if (new != (sector_t)new) | |
e464eafd | 5151 | return -EINVAL; |
23ddff37 | 5152 | |
6791875e N |
5153 | err = mddev_lock(mddev); |
5154 | if (err) | |
5155 | return err; | |
5156 | err = -EINVAL; | |
5157 | if (mddev->pers == NULL || | |
5158 | mddev->pers->quiesce == NULL) | |
5159 | goto unlock; | |
b03e0ccb | 5160 | mddev_suspend(mddev); |
23ddff37 | 5161 | mddev->suspend_lo = new; |
b03e0ccb N |
5162 | mddev_resume(mddev); |
5163 | ||
6791875e N |
5164 | err = 0; |
5165 | unlock: | |
5166 | mddev_unlock(mddev); | |
5167 | return err ?: len; | |
e464eafd N |
5168 | } |
5169 | static struct md_sysfs_entry md_suspend_lo = | |
5170 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5171 | ||
e464eafd | 5172 | static ssize_t |
fd01b88c | 5173 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5174 | { |
5175 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5176 | } | |
5177 | ||
5178 | static ssize_t | |
fd01b88c | 5179 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5180 | { |
b03e0ccb | 5181 | unsigned long long new; |
6791875e | 5182 | int err; |
e464eafd | 5183 | |
4c9309c0 AD |
5184 | err = kstrtoull(buf, 10, &new); |
5185 | if (err < 0) | |
5186 | return err; | |
5187 | if (new != (sector_t)new) | |
e464eafd | 5188 | return -EINVAL; |
23ddff37 | 5189 | |
6791875e N |
5190 | err = mddev_lock(mddev); |
5191 | if (err) | |
5192 | return err; | |
5193 | err = -EINVAL; | |
b03e0ccb | 5194 | if (mddev->pers == NULL) |
6791875e | 5195 | goto unlock; |
b03e0ccb N |
5196 | |
5197 | mddev_suspend(mddev); | |
23ddff37 | 5198 | mddev->suspend_hi = new; |
b03e0ccb N |
5199 | mddev_resume(mddev); |
5200 | ||
6791875e N |
5201 | err = 0; |
5202 | unlock: | |
5203 | mddev_unlock(mddev); | |
5204 | return err ?: len; | |
e464eafd N |
5205 | } |
5206 | static struct md_sysfs_entry md_suspend_hi = | |
5207 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5208 | ||
08a02ecd | 5209 | static ssize_t |
fd01b88c | 5210 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5211 | { |
5212 | if (mddev->reshape_position != MaxSector) | |
5213 | return sprintf(page, "%llu\n", | |
5214 | (unsigned long long)mddev->reshape_position); | |
5215 | strcpy(page, "none\n"); | |
5216 | return 5; | |
5217 | } | |
5218 | ||
5219 | static ssize_t | |
fd01b88c | 5220 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5221 | { |
c6563a8c | 5222 | struct md_rdev *rdev; |
4c9309c0 | 5223 | unsigned long long new; |
6791875e | 5224 | int err; |
6791875e | 5225 | |
4c9309c0 AD |
5226 | err = kstrtoull(buf, 10, &new); |
5227 | if (err < 0) | |
5228 | return err; | |
5229 | if (new != (sector_t)new) | |
08a02ecd | 5230 | return -EINVAL; |
6791875e N |
5231 | err = mddev_lock(mddev); |
5232 | if (err) | |
5233 | return err; | |
5234 | err = -EBUSY; | |
5235 | if (mddev->pers) | |
5236 | goto unlock; | |
08a02ecd N |
5237 | mddev->reshape_position = new; |
5238 | mddev->delta_disks = 0; | |
2c810cdd | 5239 | mddev->reshape_backwards = 0; |
08a02ecd N |
5240 | mddev->new_level = mddev->level; |
5241 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5242 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5243 | rdev_for_each(rdev, mddev) |
5244 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5245 | err = 0; |
5246 | unlock: | |
5247 | mddev_unlock(mddev); | |
5248 | return err ?: len; | |
08a02ecd N |
5249 | } |
5250 | ||
5251 | static struct md_sysfs_entry md_reshape_position = | |
5252 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5253 | reshape_position_store); | |
5254 | ||
2c810cdd N |
5255 | static ssize_t |
5256 | reshape_direction_show(struct mddev *mddev, char *page) | |
5257 | { | |
5258 | return sprintf(page, "%s\n", | |
5259 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5260 | } | |
5261 | ||
5262 | static ssize_t | |
5263 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5264 | { | |
5265 | int backwards = 0; | |
6791875e N |
5266 | int err; |
5267 | ||
2c810cdd N |
5268 | if (cmd_match(buf, "forwards")) |
5269 | backwards = 0; | |
5270 | else if (cmd_match(buf, "backwards")) | |
5271 | backwards = 1; | |
5272 | else | |
5273 | return -EINVAL; | |
5274 | if (mddev->reshape_backwards == backwards) | |
5275 | return len; | |
5276 | ||
6791875e N |
5277 | err = mddev_lock(mddev); |
5278 | if (err) | |
5279 | return err; | |
2c810cdd N |
5280 | /* check if we are allowed to change */ |
5281 | if (mddev->delta_disks) | |
6791875e N |
5282 | err = -EBUSY; |
5283 | else if (mddev->persistent && | |
2c810cdd | 5284 | mddev->major_version == 0) |
6791875e N |
5285 | err = -EINVAL; |
5286 | else | |
5287 | mddev->reshape_backwards = backwards; | |
5288 | mddev_unlock(mddev); | |
5289 | return err ?: len; | |
2c810cdd N |
5290 | } |
5291 | ||
5292 | static struct md_sysfs_entry md_reshape_direction = | |
5293 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5294 | reshape_direction_store); | |
5295 | ||
b522adcd | 5296 | static ssize_t |
fd01b88c | 5297 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5298 | { |
5299 | if (mddev->external_size) | |
5300 | return sprintf(page, "%llu\n", | |
5301 | (unsigned long long)mddev->array_sectors/2); | |
5302 | else | |
5303 | return sprintf(page, "default\n"); | |
5304 | } | |
5305 | ||
5306 | static ssize_t | |
fd01b88c | 5307 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5308 | { |
5309 | sector_t sectors; | |
6791875e N |
5310 | int err; |
5311 | ||
5312 | err = mddev_lock(mddev); | |
5313 | if (err) | |
5314 | return err; | |
b522adcd | 5315 | |
ab5a98b1 | 5316 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5317 | if (mddev_is_clustered(mddev)) { |
5318 | mddev_unlock(mddev); | |
ab5a98b1 | 5319 | return -EINVAL; |
b670883b | 5320 | } |
ab5a98b1 | 5321 | |
b522adcd DW |
5322 | if (strncmp(buf, "default", 7) == 0) { |
5323 | if (mddev->pers) | |
5324 | sectors = mddev->pers->size(mddev, 0, 0); | |
5325 | else | |
5326 | sectors = mddev->array_sectors; | |
5327 | ||
5328 | mddev->external_size = 0; | |
5329 | } else { | |
5330 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5331 | err = -EINVAL; |
5332 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5333 | err = -E2BIG; | |
5334 | else | |
5335 | mddev->external_size = 1; | |
b522adcd DW |
5336 | } |
5337 | ||
6791875e N |
5338 | if (!err) { |
5339 | mddev->array_sectors = sectors; | |
5340 | if (mddev->pers) { | |
5341 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5342 | revalidate_disk(mddev->gendisk); | |
5343 | } | |
cbe6ef1d | 5344 | } |
6791875e N |
5345 | mddev_unlock(mddev); |
5346 | return err ?: len; | |
b522adcd DW |
5347 | } |
5348 | ||
5349 | static struct md_sysfs_entry md_array_size = | |
5350 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5351 | array_size_store); | |
e464eafd | 5352 | |
664aed04 AP |
5353 | static ssize_t |
5354 | consistency_policy_show(struct mddev *mddev, char *page) | |
5355 | { | |
5356 | int ret; | |
5357 | ||
5358 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5359 | ret = sprintf(page, "journal\n"); | |
5360 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5361 | ret = sprintf(page, "ppl\n"); | |
5362 | } else if (mddev->bitmap) { | |
5363 | ret = sprintf(page, "bitmap\n"); | |
5364 | } else if (mddev->pers) { | |
5365 | if (mddev->pers->sync_request) | |
5366 | ret = sprintf(page, "resync\n"); | |
5367 | else | |
5368 | ret = sprintf(page, "none\n"); | |
5369 | } else { | |
5370 | ret = sprintf(page, "unknown\n"); | |
5371 | } | |
5372 | ||
5373 | return ret; | |
5374 | } | |
5375 | ||
5376 | static ssize_t | |
5377 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5378 | { | |
ba903a3e AP |
5379 | int err = 0; |
5380 | ||
664aed04 | 5381 | if (mddev->pers) { |
ba903a3e AP |
5382 | if (mddev->pers->change_consistency_policy) |
5383 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5384 | else | |
5385 | err = -EBUSY; | |
664aed04 AP |
5386 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5387 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5388 | } else { |
ba903a3e | 5389 | err = -EINVAL; |
664aed04 | 5390 | } |
ba903a3e AP |
5391 | |
5392 | return err ? err : len; | |
664aed04 AP |
5393 | } |
5394 | ||
5395 | static struct md_sysfs_entry md_consistency_policy = | |
5396 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5397 | consistency_policy_store); | |
5398 | ||
9a567843 GJ |
5399 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5400 | { | |
5401 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5402 | } | |
5403 | ||
5404 | /* | |
5405 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5406 | * from RAID1/RAID10. | |
5407 | */ | |
5408 | static ssize_t | |
5409 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5410 | { | |
5411 | int ret; | |
5412 | bool value; | |
5413 | ||
5414 | ret = kstrtobool(buf, &value); | |
5415 | if (ret) | |
5416 | return ret; | |
5417 | ||
5418 | if (value != mddev->fail_last_dev) | |
5419 | mddev->fail_last_dev = value; | |
5420 | ||
5421 | return len; | |
5422 | } | |
5423 | static struct md_sysfs_entry md_fail_last_dev = | |
5424 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5425 | fail_last_dev_store); | |
5426 | ||
3938f5fb GJ |
5427 | static ssize_t serialize_policy_show(struct mddev *mddev, char *page) |
5428 | { | |
5429 | if (mddev->pers == NULL || (mddev->pers->level != 1)) | |
5430 | return sprintf(page, "n/a\n"); | |
5431 | else | |
5432 | return sprintf(page, "%d\n", mddev->serialize_policy); | |
5433 | } | |
5434 | ||
5435 | /* | |
5436 | * Setting serialize_policy to true to enforce write IO is not reordered | |
5437 | * for raid1. | |
5438 | */ | |
5439 | static ssize_t | |
5440 | serialize_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5441 | { | |
5442 | int err; | |
5443 | bool value; | |
5444 | ||
5445 | err = kstrtobool(buf, &value); | |
5446 | if (err) | |
5447 | return err; | |
5448 | ||
5449 | if (value == mddev->serialize_policy) | |
5450 | return len; | |
5451 | ||
5452 | err = mddev_lock(mddev); | |
5453 | if (err) | |
5454 | return err; | |
5455 | if (mddev->pers == NULL || (mddev->pers->level != 1)) { | |
5456 | pr_err("md: serialize_policy is only effective for raid1\n"); | |
5457 | err = -EINVAL; | |
5458 | goto unlock; | |
5459 | } | |
5460 | ||
5461 | mddev_suspend(mddev); | |
5462 | if (value) | |
5463 | mddev_create_serial_pool(mddev, NULL, true); | |
5464 | else | |
5465 | mddev_destroy_serial_pool(mddev, NULL, true); | |
5466 | mddev->serialize_policy = value; | |
5467 | mddev_resume(mddev); | |
5468 | unlock: | |
5469 | mddev_unlock(mddev); | |
5470 | return err ?: len; | |
5471 | } | |
5472 | ||
5473 | static struct md_sysfs_entry md_serialize_policy = | |
5474 | __ATTR(serialize_policy, S_IRUGO | S_IWUSR, serialize_policy_show, | |
5475 | serialize_policy_store); | |
5476 | ||
5477 | ||
eae1701f N |
5478 | static struct attribute *md_default_attrs[] = { |
5479 | &md_level.attr, | |
d4dbd025 | 5480 | &md_layout.attr, |
eae1701f | 5481 | &md_raid_disks.attr, |
3b34380a | 5482 | &md_chunk_size.attr, |
a35b0d69 | 5483 | &md_size.attr, |
a94213b1 | 5484 | &md_resync_start.attr, |
8bb93aac | 5485 | &md_metadata.attr, |
6d7ff738 | 5486 | &md_new_device.attr, |
16f17b39 | 5487 | &md_safe_delay.attr, |
9e653b63 | 5488 | &md_array_state.attr, |
08a02ecd | 5489 | &md_reshape_position.attr, |
2c810cdd | 5490 | &md_reshape_direction.attr, |
b522adcd | 5491 | &md_array_size.attr, |
1e50915f | 5492 | &max_corr_read_errors.attr, |
664aed04 | 5493 | &md_consistency_policy.attr, |
9a567843 | 5494 | &md_fail_last_dev.attr, |
3938f5fb | 5495 | &md_serialize_policy.attr, |
411036fa N |
5496 | NULL, |
5497 | }; | |
5498 | ||
5499 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5500 | &md_scan_mode.attr, |
c4a39551 | 5501 | &md_last_scan_mode.attr, |
9d88883e | 5502 | &md_mismatches.attr, |
88202a0c N |
5503 | &md_sync_min.attr, |
5504 | &md_sync_max.attr, | |
5505 | &md_sync_speed.attr, | |
90b08710 | 5506 | &md_sync_force_parallel.attr, |
88202a0c | 5507 | &md_sync_completed.attr, |
5e96ee65 | 5508 | &md_min_sync.attr, |
c6207277 | 5509 | &md_max_sync.attr, |
e464eafd N |
5510 | &md_suspend_lo.attr, |
5511 | &md_suspend_hi.attr, | |
9b1d1dac | 5512 | &md_bitmap.attr, |
d7f3d291 | 5513 | &md_degraded.attr, |
eae1701f N |
5514 | NULL, |
5515 | }; | |
411036fa N |
5516 | static struct attribute_group md_redundancy_group = { |
5517 | .name = NULL, | |
5518 | .attrs = md_redundancy_attrs, | |
5519 | }; | |
5520 | ||
eae1701f N |
5521 | static ssize_t |
5522 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5523 | { | |
5524 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5525 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5526 | ssize_t rv; |
eae1701f N |
5527 | |
5528 | if (!entry->show) | |
5529 | return -EIO; | |
af8a2434 N |
5530 | spin_lock(&all_mddevs_lock); |
5531 | if (list_empty(&mddev->all_mddevs)) { | |
5532 | spin_unlock(&all_mddevs_lock); | |
5533 | return -EBUSY; | |
5534 | } | |
5535 | mddev_get(mddev); | |
5536 | spin_unlock(&all_mddevs_lock); | |
5537 | ||
b7b17c9b | 5538 | rv = entry->show(mddev, page); |
af8a2434 | 5539 | mddev_put(mddev); |
96de1e66 | 5540 | return rv; |
eae1701f N |
5541 | } |
5542 | ||
5543 | static ssize_t | |
5544 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5545 | const char *page, size_t length) | |
5546 | { | |
5547 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5548 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5549 | ssize_t rv; |
eae1701f N |
5550 | |
5551 | if (!entry->store) | |
5552 | return -EIO; | |
67463acb N |
5553 | if (!capable(CAP_SYS_ADMIN)) |
5554 | return -EACCES; | |
af8a2434 N |
5555 | spin_lock(&all_mddevs_lock); |
5556 | if (list_empty(&mddev->all_mddevs)) { | |
5557 | spin_unlock(&all_mddevs_lock); | |
5558 | return -EBUSY; | |
5559 | } | |
5560 | mddev_get(mddev); | |
5561 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5562 | rv = entry->store(mddev, page, length); |
af8a2434 | 5563 | mddev_put(mddev); |
96de1e66 | 5564 | return rv; |
eae1701f N |
5565 | } |
5566 | ||
5567 | static void md_free(struct kobject *ko) | |
5568 | { | |
fd01b88c | 5569 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5570 | |
5571 | if (mddev->sysfs_state) | |
5572 | sysfs_put(mddev->sysfs_state); | |
e1a86dbb JB |
5573 | if (mddev->sysfs_completed) |
5574 | sysfs_put(mddev->sysfs_completed); | |
5575 | if (mddev->sysfs_degraded) | |
5576 | sysfs_put(mddev->sysfs_degraded); | |
5577 | if (mddev->sysfs_level) | |
5578 | sysfs_put(mddev->sysfs_level); | |
5579 | ||
a21d1504 | 5580 | |
d8115c35 BVA |
5581 | if (mddev->gendisk) |
5582 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5583 | if (mddev->queue) |
5584 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5585 | if (mddev->gendisk) |
a21d1504 | 5586 | put_disk(mddev->gendisk); |
4ad23a97 | 5587 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5588 | |
28dec870 KO |
5589 | bioset_exit(&mddev->bio_set); |
5590 | bioset_exit(&mddev->sync_set); | |
41d2d848 | 5591 | mempool_exit(&mddev->md_io_pool); |
eae1701f N |
5592 | kfree(mddev); |
5593 | } | |
5594 | ||
52cf25d0 | 5595 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5596 | .show = md_attr_show, |
5597 | .store = md_attr_store, | |
5598 | }; | |
5599 | static struct kobj_type md_ktype = { | |
5600 | .release = md_free, | |
5601 | .sysfs_ops = &md_sysfs_ops, | |
5602 | .default_attrs = md_default_attrs, | |
5603 | }; | |
5604 | ||
1da177e4 LT |
5605 | int mdp_major = 0; |
5606 | ||
5fd3a17e DW |
5607 | static void mddev_delayed_delete(struct work_struct *ws) |
5608 | { | |
fd01b88c | 5609 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5610 | |
43a70507 | 5611 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5612 | kobject_del(&mddev->kobj); |
5613 | kobject_put(&mddev->kobj); | |
5614 | } | |
5615 | ||
4ad23a97 N |
5616 | static void no_op(struct percpu_ref *r) {} |
5617 | ||
a415c0f1 N |
5618 | int mddev_init_writes_pending(struct mddev *mddev) |
5619 | { | |
5620 | if (mddev->writes_pending.percpu_count_ptr) | |
5621 | return 0; | |
ddde2af7 RG |
5622 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5623 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5624 | return -ENOMEM; |
5625 | /* We want to start with the refcount at zero */ | |
5626 | percpu_ref_put(&mddev->writes_pending); | |
5627 | return 0; | |
5628 | } | |
5629 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5630 | ||
efeb53c0 | 5631 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5632 | { |
039b7225 N |
5633 | /* |
5634 | * If dev is zero, name is the name of a device to allocate with | |
5635 | * an arbitrary minor number. It will be "md_???" | |
5636 | * If dev is non-zero it must be a device number with a MAJOR of | |
5637 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5638 | * the device is being created by opening a node in /dev. | |
5639 | * If "name" is not NULL, the device is being created by | |
5640 | * writing to /sys/module/md_mod/parameters/new_array. | |
5641 | */ | |
48c9c27b | 5642 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5643 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5644 | struct gendisk *disk; |
efeb53c0 N |
5645 | int partitioned; |
5646 | int shift; | |
5647 | int unit; | |
3830c62f | 5648 | int error; |
1da177e4 LT |
5649 | |
5650 | if (!mddev) | |
efeb53c0 N |
5651 | return -ENODEV; |
5652 | ||
5653 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5654 | shift = partitioned ? MdpMinorShift : 0; | |
5655 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5656 | |
e804ac78 TH |
5657 | /* wait for any previous instance of this device to be |
5658 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5659 | */ |
e804ac78 | 5660 | flush_workqueue(md_misc_wq); |
d3374825 | 5661 | |
48c9c27b | 5662 | mutex_lock(&disks_mutex); |
0909dc44 N |
5663 | error = -EEXIST; |
5664 | if (mddev->gendisk) | |
5665 | goto abort; | |
efeb53c0 | 5666 | |
039b7225 | 5667 | if (name && !dev) { |
efeb53c0 N |
5668 | /* Need to ensure that 'name' is not a duplicate. |
5669 | */ | |
fd01b88c | 5670 | struct mddev *mddev2; |
efeb53c0 N |
5671 | spin_lock(&all_mddevs_lock); |
5672 | ||
5673 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5674 | if (mddev2->gendisk && | |
5675 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5676 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5677 | goto abort; |
efeb53c0 N |
5678 | } |
5679 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5680 | } |
039b7225 N |
5681 | if (name && dev) |
5682 | /* | |
5683 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5684 | */ | |
5685 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5686 | |
41d2d848 AP |
5687 | error = mempool_init_kmalloc_pool(&mddev->md_io_pool, BIO_POOL_SIZE, |
5688 | sizeof(struct md_io)); | |
5689 | if (error) | |
5690 | goto abort; | |
5691 | ||
0909dc44 | 5692 | error = -ENOMEM; |
c62b37d9 | 5693 | mddev->queue = blk_alloc_queue(NUMA_NO_NODE); |
0909dc44 N |
5694 | if (!mddev->queue) |
5695 | goto abort; | |
409c57f3 | 5696 | |
b1bd055d | 5697 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5698 | |
1da177e4 LT |
5699 | disk = alloc_disk(1 << shift); |
5700 | if (!disk) { | |
8b765398 N |
5701 | blk_cleanup_queue(mddev->queue); |
5702 | mddev->queue = NULL; | |
0909dc44 | 5703 | goto abort; |
1da177e4 | 5704 | } |
efeb53c0 | 5705 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5706 | disk->first_minor = unit << shift; |
efeb53c0 N |
5707 | if (name) |
5708 | strcpy(disk->disk_name, name); | |
5709 | else if (partitioned) | |
1da177e4 | 5710 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5711 | else |
1da177e4 | 5712 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5713 | disk->fops = &md_fops; |
5714 | disk->private_data = mddev; | |
5715 | disk->queue = mddev->queue; | |
56883a7e | 5716 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5717 | /* Allow extended partitions. This makes the |
d3374825 | 5718 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5719 | * remove it now. |
5720 | */ | |
5721 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5722 | mddev->gendisk = disk; |
b0140891 N |
5723 | /* As soon as we call add_disk(), another thread could get |
5724 | * through to md_open, so make sure it doesn't get too far | |
5725 | */ | |
5726 | mutex_lock(&mddev->open_mutex); | |
5727 | add_disk(disk); | |
5728 | ||
28dec870 | 5729 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5730 | if (error) { |
5731 | /* This isn't possible, but as kobject_init_and_add is marked | |
5732 | * __must_check, we must do something with the result | |
5733 | */ | |
9d48739e N |
5734 | pr_debug("md: cannot register %s/md - name in use\n", |
5735 | disk->disk_name); | |
0909dc44 N |
5736 | error = 0; |
5737 | } | |
00bcb4ac N |
5738 | if (mddev->kobj.sd && |
5739 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5740 | pr_debug("pointless warning\n"); |
b0140891 | 5741 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5742 | abort: |
5743 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5744 | if (!error && mddev->kobj.sd) { |
3830c62f | 5745 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5746 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
e1a86dbb JB |
5747 | mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed"); |
5748 | mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded"); | |
5749 | mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); | |
b62b7590 | 5750 | } |
d3374825 | 5751 | mddev_put(mddev); |
0909dc44 | 5752 | return error; |
efeb53c0 N |
5753 | } |
5754 | ||
5755 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5756 | { | |
78b6350d N |
5757 | if (create_on_open) |
5758 | md_alloc(dev, NULL); | |
1da177e4 LT |
5759 | return NULL; |
5760 | } | |
5761 | ||
e4dca7b7 | 5762 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5763 | { |
039b7225 N |
5764 | /* |
5765 | * val must be "md_*" or "mdNNN". | |
5766 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5767 | * set the name to val. val must not already be an active name. |
039b7225 N |
5768 | * For "mdNNN" we allocate an array with the minor number NNN |
5769 | * which must not already be in use. | |
efeb53c0 N |
5770 | */ |
5771 | int len = strlen(val); | |
5772 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5773 | unsigned long devnum; |
efeb53c0 N |
5774 | |
5775 | while (len && val[len-1] == '\n') | |
5776 | len--; | |
5777 | if (len >= DISK_NAME_LEN) | |
5778 | return -E2BIG; | |
5779 | strlcpy(buf, val, len+1); | |
039b7225 N |
5780 | if (strncmp(buf, "md_", 3) == 0) |
5781 | return md_alloc(0, buf); | |
5782 | if (strncmp(buf, "md", 2) == 0 && | |
5783 | isdigit(buf[2]) && | |
5784 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5785 | devnum <= MINORMASK) | |
5786 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5787 | ||
5788 | return -EINVAL; | |
efeb53c0 N |
5789 | } |
5790 | ||
8376d3c1 | 5791 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5792 | { |
8376d3c1 | 5793 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5794 | |
4ad23a97 N |
5795 | mddev->safemode = 1; |
5796 | if (mddev->external) | |
5797 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5798 | ||
1da177e4 LT |
5799 | md_wakeup_thread(mddev->thread); |
5800 | } | |
5801 | ||
6ff8d8ec | 5802 | static int start_dirty_degraded; |
1da177e4 | 5803 | |
fd01b88c | 5804 | int md_run(struct mddev *mddev) |
1da177e4 | 5805 | { |
2604b703 | 5806 | int err; |
3cb03002 | 5807 | struct md_rdev *rdev; |
84fc4b56 | 5808 | struct md_personality *pers; |
1da177e4 | 5809 | |
a757e64c N |
5810 | if (list_empty(&mddev->disks)) |
5811 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5812 | return -EINVAL; |
1da177e4 LT |
5813 | |
5814 | if (mddev->pers) | |
5815 | return -EBUSY; | |
bb4f1e9d N |
5816 | /* Cannot run until previous stop completes properly */ |
5817 | if (mddev->sysfs_active) | |
5818 | return -EBUSY; | |
b6eb127d | 5819 | |
1da177e4 LT |
5820 | /* |
5821 | * Analyze all RAID superblock(s) | |
5822 | */ | |
1ec4a939 N |
5823 | if (!mddev->raid_disks) { |
5824 | if (!mddev->persistent) | |
5825 | return -EINVAL; | |
6a5cb53a YY |
5826 | err = analyze_sbs(mddev); |
5827 | if (err) | |
5828 | return -EINVAL; | |
1ec4a939 | 5829 | } |
1da177e4 | 5830 | |
d9d166c2 N |
5831 | if (mddev->level != LEVEL_NONE) |
5832 | request_module("md-level-%d", mddev->level); | |
5833 | else if (mddev->clevel[0]) | |
5834 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5835 | |
5836 | /* | |
5837 | * Drop all container device buffers, from now on | |
5838 | * the only valid external interface is through the md | |
5839 | * device. | |
1da177e4 | 5840 | */ |
4b6c1060 | 5841 | mddev->has_superblocks = false; |
dafb20fa | 5842 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5843 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5844 | continue; |
5845 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5846 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5847 | if (mddev->ro != 1 && |
5848 | (bdev_read_only(rdev->bdev) || | |
5849 | bdev_read_only(rdev->meta_bdev))) { | |
5850 | mddev->ro = 1; | |
5851 | if (mddev->gendisk) | |
5852 | set_disk_ro(mddev->gendisk, 1); | |
5853 | } | |
f0d76d70 | 5854 | |
4b6c1060 HM |
5855 | if (rdev->sb_page) |
5856 | mddev->has_superblocks = true; | |
5857 | ||
f0d76d70 N |
5858 | /* perform some consistency tests on the device. |
5859 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5860 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5861 | */ |
a6ff7e08 JB |
5862 | if (rdev->meta_bdev) { |
5863 | /* Nothing to check */; | |
5864 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5865 | if (mddev->dev_sectors && |
5866 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5867 | > rdev->sb_start) { |
9d48739e N |
5868 | pr_warn("md: %s: data overlaps metadata\n", |
5869 | mdname(mddev)); | |
f0d76d70 N |
5870 | return -EINVAL; |
5871 | } | |
5872 | } else { | |
0f420358 | 5873 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5874 | > rdev->data_offset) { |
9d48739e N |
5875 | pr_warn("md: %s: metadata overlaps data\n", |
5876 | mdname(mddev)); | |
f0d76d70 N |
5877 | return -EINVAL; |
5878 | } | |
5879 | } | |
00bcb4ac | 5880 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5881 | } |
5882 | ||
afeee514 KO |
5883 | if (!bioset_initialized(&mddev->bio_set)) { |
5884 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5885 | if (err) | |
5886 | return err; | |
10273170 | 5887 | } |
afeee514 KO |
5888 | if (!bioset_initialized(&mddev->sync_set)) { |
5889 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5890 | if (err) | |
28dec870 | 5891 | return err; |
5a85071c | 5892 | } |
a167f663 | 5893 | |
1da177e4 | 5894 | spin_lock(&pers_lock); |
d9d166c2 | 5895 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5896 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5897 | spin_unlock(&pers_lock); |
d9d166c2 | 5898 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5899 | pr_warn("md: personality for level %d is not loaded!\n", |
5900 | mddev->level); | |
d9d166c2 | 5901 | else |
9d48739e N |
5902 | pr_warn("md: personality for level %s is not loaded!\n", |
5903 | mddev->clevel); | |
bfc9dfdc SL |
5904 | err = -EINVAL; |
5905 | goto abort; | |
1da177e4 | 5906 | } |
1da177e4 | 5907 | spin_unlock(&pers_lock); |
34817e8c N |
5908 | if (mddev->level != pers->level) { |
5909 | mddev->level = pers->level; | |
5910 | mddev->new_level = pers->level; | |
5911 | } | |
d9d166c2 | 5912 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5913 | |
f6705578 | 5914 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5915 | pers->start_reshape == NULL) { |
f6705578 | 5916 | /* This personality cannot handle reshaping... */ |
f6705578 | 5917 | module_put(pers->owner); |
bfc9dfdc SL |
5918 | err = -EINVAL; |
5919 | goto abort; | |
f6705578 N |
5920 | } |
5921 | ||
7dd5e7c3 N |
5922 | if (pers->sync_request) { |
5923 | /* Warn if this is a potentially silly | |
5924 | * configuration. | |
5925 | */ | |
5926 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5927 | struct md_rdev *rdev2; |
7dd5e7c3 | 5928 | int warned = 0; |
159ec1fc | 5929 | |
dafb20fa N |
5930 | rdev_for_each(rdev, mddev) |
5931 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5932 | if (rdev < rdev2 && |
5933 | rdev->bdev->bd_contains == | |
5934 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5935 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5936 | mdname(mddev), | |
5937 | bdevname(rdev->bdev,b), | |
5938 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5939 | warned = 1; |
5940 | } | |
5941 | } | |
159ec1fc | 5942 | |
7dd5e7c3 | 5943 | if (warned) |
9d48739e | 5944 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5945 | } |
5946 | ||
657390d2 | 5947 | mddev->recovery = 0; |
58c0fed4 AN |
5948 | /* may be over-ridden by personality */ |
5949 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5950 | ||
6ff8d8ec | 5951 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5952 | |
0f9552b5 | 5953 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5954 | mddev->ro = 2; /* read-only, but switch on first write */ |
5955 | ||
36d091f4 | 5956 | err = pers->run(mddev); |
13e53df3 | 5957 | if (err) |
9d48739e | 5958 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5959 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5960 | WARN_ONCE(!mddev->external_size, |
5961 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5962 | __func__); | |
5963 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5964 | (unsigned long long)mddev->array_sectors / 2, | |
5965 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5966 | err = -EINVAL; |
b522adcd | 5967 | } |
36d091f4 | 5968 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5969 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5970 | struct bitmap *bitmap; |
5971 | ||
e64e4018 | 5972 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5973 | if (IS_ERR(bitmap)) { |
5974 | err = PTR_ERR(bitmap); | |
9d48739e N |
5975 | pr_warn("%s: failed to create bitmap (%d)\n", |
5976 | mdname(mddev), err); | |
f9209a32 GR |
5977 | } else |
5978 | mddev->bitmap = bitmap; | |
5979 | ||
b15c2e57 | 5980 | } |
d494549a GJ |
5981 | if (err) |
5982 | goto bitmap_abort; | |
3e148a32 GJ |
5983 | |
5984 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5985 | bool create_pool = false; |
3e148a32 GJ |
5986 | |
5987 | rdev_for_each(rdev, mddev) { | |
5988 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5989 | rdev_init_serial(rdev)) |
3e173ab5 | 5990 | create_pool = true; |
3e148a32 | 5991 | } |
3e173ab5 | 5992 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5993 | mddev->serial_info_pool = |
5994 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5995 | sizeof(struct serial_info)); | |
5996 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5997 | err = -ENOMEM; |
d494549a | 5998 | goto bitmap_abort; |
3e148a32 GJ |
5999 | } |
6000 | } | |
6001 | } | |
6002 | ||
5c675f83 | 6003 | if (mddev->queue) { |
bb086a89 SL |
6004 | bool nonrot = true; |
6005 | ||
6006 | rdev_for_each(rdev, mddev) { | |
6007 | if (rdev->raid_disk >= 0 && | |
6008 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
6009 | nonrot = false; | |
6010 | break; | |
6011 | } | |
6012 | } | |
6013 | if (mddev->degraded) | |
6014 | nonrot = false; | |
6015 | if (nonrot) | |
8b904b5b | 6016 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 6017 | else |
8b904b5b | 6018 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
dc3b17cc JK |
6019 | mddev->queue->backing_dev_info->congested_data = mddev; |
6020 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 6021 | } |
36d091f4 | 6022 | if (pers->sync_request) { |
00bcb4ac N |
6023 | if (mddev->kobj.sd && |
6024 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
6025 | pr_warn("md: cannot register extra attributes for %s\n", |
6026 | mdname(mddev)); | |
00bcb4ac | 6027 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 6028 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
6029 | mddev->ro = 0; |
6030 | ||
1e50915f RB |
6031 | atomic_set(&mddev->max_corr_read_errors, |
6032 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 6033 | mddev->safemode = 0; |
28c1b9fd GR |
6034 | if (mddev_is_clustered(mddev)) |
6035 | mddev->safemode_delay = 0; | |
6036 | else | |
6037 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 6038 | mddev->in_sync = 1; |
0ca69886 | 6039 | smp_wmb(); |
36d091f4 N |
6040 | spin_lock(&mddev->lock); |
6041 | mddev->pers = pers; | |
36d091f4 | 6042 | spin_unlock(&mddev->lock); |
dafb20fa | 6043 | rdev_for_each(rdev, mddev) |
36fad858 | 6044 | if (rdev->raid_disk >= 0) |
e5b521ee | 6045 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 6046 | |
a4a3d26d N |
6047 | if (mddev->degraded && !mddev->ro) |
6048 | /* This ensures that recovering status is reported immediately | |
6049 | * via sysfs - until a lack of spares is confirmed. | |
6050 | */ | |
6051 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 6052 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 6053 | |
2953079c | 6054 | if (mddev->sb_flags) |
850b2b42 | 6055 | md_update_sb(mddev, 0); |
1da177e4 | 6056 | |
d7603b7e | 6057 | md_new_event(mddev); |
1da177e4 | 6058 | return 0; |
b126194c | 6059 | |
d494549a GJ |
6060 | bitmap_abort: |
6061 | mddev_detach(mddev); | |
6062 | if (mddev->private) | |
6063 | pers->free(mddev, mddev->private); | |
6064 | mddev->private = NULL; | |
6065 | module_put(pers->owner); | |
6066 | md_bitmap_destroy(mddev); | |
b126194c | 6067 | abort: |
4bc034d3 N |
6068 | bioset_exit(&mddev->bio_set); |
6069 | bioset_exit(&mddev->sync_set); | |
b126194c | 6070 | return err; |
1da177e4 | 6071 | } |
390ee602 | 6072 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 6073 | |
fd01b88c | 6074 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
6075 | { |
6076 | int err; | |
6077 | ||
9d4b45d6 | 6078 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6079 | err = md_run(mddev); |
6080 | if (err) | |
6081 | goto out; | |
e64e4018 | 6082 | err = md_bitmap_load(mddev); |
69e51b44 | 6083 | if (err) { |
e64e4018 | 6084 | md_bitmap_destroy(mddev); |
69e51b44 N |
6085 | goto out; |
6086 | } | |
0fd018af | 6087 | |
28c1b9fd GR |
6088 | if (mddev_is_clustered(mddev)) |
6089 | md_allow_write(mddev); | |
6090 | ||
d5d885fd SL |
6091 | /* run start up tasks that require md_thread */ |
6092 | md_start(mddev); | |
6093 | ||
0fd018af JB |
6094 | md_wakeup_thread(mddev->thread); |
6095 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
6096 | ||
fe60b014 N |
6097 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6098 | revalidate_disk(mddev->gendisk); | |
9d4b45d6 | 6099 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 6100 | mddev->changed = 1; |
fe60b014 | 6101 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
6102 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6103 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
e1a86dbb | 6104 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
fe60b014 | 6105 | out: |
9d4b45d6 | 6106 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
6107 | return err; |
6108 | } | |
6109 | ||
d5d885fd SL |
6110 | int md_start(struct mddev *mddev) |
6111 | { | |
6112 | int ret = 0; | |
6113 | ||
6114 | if (mddev->pers->start) { | |
6115 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6116 | md_wakeup_thread(mddev->thread); | |
6117 | ret = mddev->pers->start(mddev); | |
6118 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
6119 | md_wakeup_thread(mddev->sync_thread); | |
6120 | } | |
6121 | return ret; | |
6122 | } | |
6123 | EXPORT_SYMBOL_GPL(md_start); | |
6124 | ||
fd01b88c | 6125 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
6126 | { |
6127 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
6128 | struct md_rdev *rdev; |
6129 | bool has_journal = false; | |
6130 | bool has_readonly = false; | |
1da177e4 | 6131 | |
80fab1d7 | 6132 | /* Complain if it has no devices */ |
1da177e4 | 6133 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
6134 | return -ENXIO; |
6135 | if (!mddev->pers) | |
6136 | return -EINVAL; | |
6137 | if (!mddev->ro) | |
6138 | return -EBUSY; | |
339421de | 6139 | |
97b20ef7 N |
6140 | rcu_read_lock(); |
6141 | rdev_for_each_rcu(rdev, mddev) { | |
6142 | if (test_bit(Journal, &rdev->flags) && | |
6143 | !test_bit(Faulty, &rdev->flags)) | |
6144 | has_journal = true; | |
6145 | if (bdev_read_only(rdev->bdev)) | |
6146 | has_readonly = true; | |
6147 | } | |
6148 | rcu_read_unlock(); | |
6149 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 6150 | /* Don't restart rw with journal missing/faulty */ |
339421de | 6151 | return -EINVAL; |
97b20ef7 N |
6152 | if (has_readonly) |
6153 | return -EROFS; | |
339421de | 6154 | |
80fab1d7 AN |
6155 | mddev->safemode = 0; |
6156 | mddev->ro = 0; | |
6157 | set_disk_ro(disk, 0); | |
9d48739e | 6158 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
6159 | /* Kick recovery or resync if necessary */ |
6160 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6161 | md_wakeup_thread(mddev->thread); | |
6162 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 6163 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 6164 | return 0; |
1da177e4 LT |
6165 | } |
6166 | ||
fd01b88c | 6167 | static void md_clean(struct mddev *mddev) |
6177b472 N |
6168 | { |
6169 | mddev->array_sectors = 0; | |
6170 | mddev->external_size = 0; | |
6171 | mddev->dev_sectors = 0; | |
6172 | mddev->raid_disks = 0; | |
6173 | mddev->recovery_cp = 0; | |
6174 | mddev->resync_min = 0; | |
6175 | mddev->resync_max = MaxSector; | |
6176 | mddev->reshape_position = MaxSector; | |
6177 | mddev->external = 0; | |
6178 | mddev->persistent = 0; | |
6179 | mddev->level = LEVEL_NONE; | |
6180 | mddev->clevel[0] = 0; | |
6181 | mddev->flags = 0; | |
2953079c | 6182 | mddev->sb_flags = 0; |
6177b472 N |
6183 | mddev->ro = 0; |
6184 | mddev->metadata_type[0] = 0; | |
6185 | mddev->chunk_sectors = 0; | |
6186 | mddev->ctime = mddev->utime = 0; | |
6187 | mddev->layout = 0; | |
6188 | mddev->max_disks = 0; | |
6189 | mddev->events = 0; | |
a8707c08 | 6190 | mddev->can_decrease_events = 0; |
6177b472 | 6191 | mddev->delta_disks = 0; |
2c810cdd | 6192 | mddev->reshape_backwards = 0; |
6177b472 N |
6193 | mddev->new_level = LEVEL_NONE; |
6194 | mddev->new_layout = 0; | |
6195 | mddev->new_chunk_sectors = 0; | |
6196 | mddev->curr_resync = 0; | |
7f7583d4 | 6197 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
6198 | mddev->suspend_lo = mddev->suspend_hi = 0; |
6199 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
6200 | mddev->recovery = 0; | |
6201 | mddev->in_sync = 0; | |
f0b4f7e2 | 6202 | mddev->changed = 0; |
6177b472 | 6203 | mddev->degraded = 0; |
6177b472 | 6204 | mddev->safemode = 0; |
bd691922 | 6205 | mddev->private = NULL; |
c20c33f0 | 6206 | mddev->cluster_info = NULL; |
6177b472 N |
6207 | mddev->bitmap_info.offset = 0; |
6208 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 6209 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
6210 | mddev->bitmap_info.chunksize = 0; |
6211 | mddev->bitmap_info.daemon_sleep = 0; | |
6212 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6213 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6214 | } |
6215 | ||
fd01b88c | 6216 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6217 | { |
6b6204ee | 6218 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
21e0958e GJ |
6219 | if (work_pending(&mddev->del_work)) |
6220 | flush_workqueue(md_misc_wq); | |
a047e125 | 6221 | if (mddev->sync_thread) { |
a047e125 | 6222 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 6223 | md_reap_sync_thread(mddev); |
a047e125 N |
6224 | } |
6225 | ||
6226 | del_timer_sync(&mddev->safemode_timer); | |
6227 | ||
034e33f5 SL |
6228 | if (mddev->pers && mddev->pers->quiesce) { |
6229 | mddev->pers->quiesce(mddev, 1); | |
6230 | mddev->pers->quiesce(mddev, 0); | |
6231 | } | |
e64e4018 | 6232 | md_bitmap_flush(mddev); |
a047e125 | 6233 | |
b6d428c6 | 6234 | if (mddev->ro == 0 && |
28c1b9fd | 6235 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6236 | mddev->sb_flags)) { |
a047e125 | 6237 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6238 | if (!mddev_is_clustered(mddev)) |
6239 | mddev->in_sync = 1; | |
a047e125 N |
6240 | md_update_sb(mddev, 1); |
6241 | } | |
69b00b5b GJ |
6242 | /* disable policy to guarantee rdevs free resources for serialization */ |
6243 | mddev->serialize_policy = 0; | |
6244 | mddev_destroy_serial_pool(mddev, NULL, true); | |
a047e125 | 6245 | } |
defad61a | 6246 | |
fd01b88c | 6247 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6248 | { |
29f097c4 | 6249 | mddev_lock_nointr(mddev); |
defad61a N |
6250 | __md_stop_writes(mddev); |
6251 | mddev_unlock(mddev); | |
6252 | } | |
390ee602 | 6253 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6254 | |
5aa61f42 N |
6255 | static void mddev_detach(struct mddev *mddev) |
6256 | { | |
e64e4018 | 6257 | md_bitmap_wait_behind_writes(mddev); |
6b40bec3 | 6258 | if (mddev->pers && mddev->pers->quiesce && !mddev->suspended) { |
5aa61f42 N |
6259 | mddev->pers->quiesce(mddev, 1); |
6260 | mddev->pers->quiesce(mddev, 0); | |
6261 | } | |
6262 | md_unregister_thread(&mddev->thread); | |
6263 | if (mddev->queue) | |
6264 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6265 | } | |
6266 | ||
5eff3c43 | 6267 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6268 | { |
36d091f4 | 6269 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6270 | md_bitmap_destroy(mddev); |
5aa61f42 | 6271 | mddev_detach(mddev); |
ee5d004f | 6272 | /* Ensure ->event_work is done */ |
21e0958e GJ |
6273 | if (mddev->event_work.func) |
6274 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6275 | spin_lock(&mddev->lock); |
6177b472 | 6276 | mddev->pers = NULL; |
36d091f4 N |
6277 | spin_unlock(&mddev->lock); |
6278 | pers->free(mddev, mddev->private); | |
bd691922 | 6279 | mddev->private = NULL; |
36d091f4 N |
6280 | if (pers->sync_request && mddev->to_remove == NULL) |
6281 | mddev->to_remove = &md_redundancy_group; | |
6282 | module_put(pers->owner); | |
cca9cf90 | 6283 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6284 | } |
6285 | ||
6286 | void md_stop(struct mddev *mddev) | |
6287 | { | |
6288 | /* stop the array and free an attached data structures. | |
6289 | * This is called from dm-raid | |
6290 | */ | |
6291 | __md_stop(mddev); | |
afeee514 KO |
6292 | bioset_exit(&mddev->bio_set); |
6293 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6294 | } |
6295 | ||
390ee602 | 6296 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6297 | |
a05b7ea0 | 6298 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6299 | { |
6300 | int err = 0; | |
30b8feb7 N |
6301 | int did_freeze = 0; |
6302 | ||
6303 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6304 | did_freeze = 1; | |
6305 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6306 | md_wakeup_thread(mddev->thread); | |
6307 | } | |
f851b60d | 6308 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6309 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6310 | if (mddev->sync_thread) |
30b8feb7 N |
6311 | /* Thread might be blocked waiting for metadata update |
6312 | * which will now never happen */ | |
6313 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6314 | |
2953079c | 6315 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6316 | return -EBUSY; |
30b8feb7 | 6317 | mddev_unlock(mddev); |
f851b60d N |
6318 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6319 | &mddev->recovery)); | |
88724bfa | 6320 | wait_event(mddev->sb_wait, |
2953079c | 6321 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6322 | mddev_lock_nointr(mddev); |
6323 | ||
a4bd82d0 | 6324 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6325 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6326 | mddev->sync_thread || |
af8d8e6f | 6327 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6328 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6329 | if (did_freeze) { |
6330 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6331 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6332 | md_wakeup_thread(mddev->thread); |
6333 | } | |
a4bd82d0 N |
6334 | err = -EBUSY; |
6335 | goto out; | |
6336 | } | |
6337 | if (mddev->pers) { | |
defad61a | 6338 | __md_stop_writes(mddev); |
a4bd82d0 N |
6339 | |
6340 | err = -ENXIO; | |
6341 | if (mddev->ro==1) | |
6342 | goto out; | |
6343 | mddev->ro = 1; | |
6344 | set_disk_ro(mddev->gendisk, 1); | |
6345 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6346 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6347 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6348 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6349 | err = 0; |
a4bd82d0 N |
6350 | } |
6351 | out: | |
6352 | mutex_unlock(&mddev->open_mutex); | |
6353 | return err; | |
6354 | } | |
6355 | ||
9e653b63 N |
6356 | /* mode: |
6357 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6358 | * 2 - stop but do not disassemble array |
6359 | */ | |
f72ffdd6 | 6360 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6361 | struct block_device *bdev) |
1da177e4 | 6362 | { |
1da177e4 | 6363 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6364 | struct md_rdev *rdev; |
30b8feb7 N |
6365 | int did_freeze = 0; |
6366 | ||
6367 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6368 | did_freeze = 1; | |
6369 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6370 | md_wakeup_thread(mddev->thread); | |
6371 | } | |
f851b60d | 6372 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6373 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6374 | if (mddev->sync_thread) |
30b8feb7 N |
6375 | /* Thread might be blocked waiting for metadata update |
6376 | * which will now never happen */ | |
6377 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6378 | |
30b8feb7 | 6379 | mddev_unlock(mddev); |
f851b60d N |
6380 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6381 | !test_bit(MD_RECOVERY_RUNNING, | |
6382 | &mddev->recovery))); | |
30b8feb7 | 6383 | mddev_lock_nointr(mddev); |
1da177e4 | 6384 | |
c8c00a69 | 6385 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6386 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6387 | mddev->sysfs_active || |
6388 | mddev->sync_thread || | |
af8d8e6f | 6389 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6390 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6391 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6392 | if (did_freeze) { |
6393 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6394 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6395 | md_wakeup_thread(mddev->thread); |
6396 | } | |
260fa034 N |
6397 | return -EBUSY; |
6398 | } | |
6e17b027 | 6399 | if (mddev->pers) { |
a4bd82d0 N |
6400 | if (mddev->ro) |
6401 | set_disk_ro(disk, 0); | |
409c57f3 | 6402 | |
defad61a | 6403 | __md_stop_writes(mddev); |
5eff3c43 | 6404 | __md_stop(mddev); |
dc3b17cc | 6405 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 6406 | |
a4bd82d0 | 6407 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6408 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6409 | |
dafb20fa | 6410 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6411 | if (rdev->raid_disk >= 0) |
6412 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6413 | |
a4bd82d0 | 6414 | set_capacity(disk, 0); |
6e17b027 | 6415 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6416 | mddev->changed = 1; |
a4bd82d0 | 6417 | revalidate_disk(disk); |
0d4ca600 | 6418 | |
a4bd82d0 N |
6419 | if (mddev->ro) |
6420 | mddev->ro = 0; | |
6e17b027 N |
6421 | } else |
6422 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6423 | /* |
6424 | * Free resources if final stop | |
6425 | */ | |
9e653b63 | 6426 | if (mode == 0) { |
9d48739e | 6427 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6428 | |
c3d9714e | 6429 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6430 | struct file *f = mddev->bitmap_info.file; |
6431 | spin_lock(&mddev->lock); | |
c3d9714e | 6432 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6433 | spin_unlock(&mddev->lock); |
6434 | fput(f); | |
978f946b | 6435 | } |
c3d9714e | 6436 | mddev->bitmap_info.offset = 0; |
978f946b | 6437 | |
1da177e4 LT |
6438 | export_array(mddev); |
6439 | ||
6177b472 | 6440 | md_clean(mddev); |
efeb53c0 N |
6441 | if (mddev->hold_active == UNTIL_STOP) |
6442 | mddev->hold_active = 0; | |
a4bd82d0 | 6443 | } |
d7603b7e | 6444 | md_new_event(mddev); |
00bcb4ac | 6445 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6446 | return 0; |
1da177e4 LT |
6447 | } |
6448 | ||
fdee8ae4 | 6449 | #ifndef MODULE |
fd01b88c | 6450 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6451 | { |
3cb03002 | 6452 | struct md_rdev *rdev; |
1da177e4 LT |
6453 | int err; |
6454 | ||
a757e64c | 6455 | if (list_empty(&mddev->disks)) |
1da177e4 | 6456 | return; |
1da177e4 | 6457 | |
9d48739e | 6458 | pr_info("md: running: "); |
1da177e4 | 6459 | |
dafb20fa | 6460 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6461 | char b[BDEVNAME_SIZE]; |
9d48739e | 6462 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6463 | } |
9d48739e | 6464 | pr_cont("\n"); |
1da177e4 | 6465 | |
d710e138 | 6466 | err = do_md_run(mddev); |
1da177e4 | 6467 | if (err) { |
9d48739e | 6468 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6469 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6470 | } |
6471 | } | |
6472 | ||
6473 | /* | |
6474 | * lets try to run arrays based on all disks that have arrived | |
6475 | * until now. (those are in pending_raid_disks) | |
6476 | * | |
6477 | * the method: pick the first pending disk, collect all disks with | |
6478 | * the same UUID, remove all from the pending list and put them into | |
6479 | * the 'same_array' list. Then order this list based on superblock | |
6480 | * update time (freshest comes first), kick out 'old' disks and | |
6481 | * compare superblocks. If everything's fine then run it. | |
6482 | * | |
6483 | * If "unit" is allocated, then bump its reference count | |
6484 | */ | |
6485 | static void autorun_devices(int part) | |
6486 | { | |
3cb03002 | 6487 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6488 | struct mddev *mddev; |
1da177e4 LT |
6489 | char b[BDEVNAME_SIZE]; |
6490 | ||
9d48739e | 6491 | pr_info("md: autorun ...\n"); |
1da177e4 | 6492 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6493 | int unit; |
1da177e4 | 6494 | dev_t dev; |
ad01c9e3 | 6495 | LIST_HEAD(candidates); |
1da177e4 | 6496 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6497 | struct md_rdev, same_set); |
1da177e4 | 6498 | |
9d48739e | 6499 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6500 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6501 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6502 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6503 | pr_debug("md: adding %s ...\n", |
6504 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6505 | list_move(&rdev->same_set, &candidates); |
6506 | } | |
6507 | /* | |
6508 | * now we have a set of devices, with all of them having | |
6509 | * mostly sane superblocks. It's time to allocate the | |
6510 | * mddev. | |
6511 | */ | |
e8703fe1 N |
6512 | if (part) { |
6513 | dev = MKDEV(mdp_major, | |
6514 | rdev0->preferred_minor << MdpMinorShift); | |
6515 | unit = MINOR(dev) >> MdpMinorShift; | |
6516 | } else { | |
6517 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6518 | unit = MINOR(dev); | |
6519 | } | |
6520 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6521 | pr_warn("md: unit number in %s is bad: %d\n", |
6522 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6523 | break; |
6524 | } | |
1da177e4 LT |
6525 | |
6526 | md_probe(dev, NULL, NULL); | |
6527 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6528 | if (!mddev || !mddev->gendisk) { |
6529 | if (mddev) | |
6530 | mddev_put(mddev); | |
1da177e4 LT |
6531 | break; |
6532 | } | |
f72ffdd6 | 6533 | if (mddev_lock(mddev)) |
9d48739e | 6534 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6535 | else if (mddev->raid_disks || mddev->major_version |
6536 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6537 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6538 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6539 | mddev_unlock(mddev); | |
6540 | } else { | |
9d48739e | 6541 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6542 | mddev->persistent = 1; |
159ec1fc | 6543 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6544 | list_del_init(&rdev->same_set); |
6545 | if (bind_rdev_to_array(rdev, mddev)) | |
6546 | export_rdev(rdev); | |
6547 | } | |
6548 | autorun_array(mddev); | |
6549 | mddev_unlock(mddev); | |
6550 | } | |
6551 | /* on success, candidates will be empty, on error | |
6552 | * it won't... | |
6553 | */ | |
159ec1fc | 6554 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6555 | list_del_init(&rdev->same_set); |
1da177e4 | 6556 | export_rdev(rdev); |
4b80991c | 6557 | } |
1da177e4 LT |
6558 | mddev_put(mddev); |
6559 | } | |
9d48739e | 6560 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6561 | } |
fdee8ae4 | 6562 | #endif /* !MODULE */ |
1da177e4 | 6563 | |
f72ffdd6 | 6564 | static int get_version(void __user *arg) |
1da177e4 LT |
6565 | { |
6566 | mdu_version_t ver; | |
6567 | ||
6568 | ver.major = MD_MAJOR_VERSION; | |
6569 | ver.minor = MD_MINOR_VERSION; | |
6570 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6571 | ||
6572 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6573 | return -EFAULT; | |
6574 | ||
6575 | return 0; | |
6576 | } | |
6577 | ||
f72ffdd6 | 6578 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6579 | { |
6580 | mdu_array_info_t info; | |
a9f326eb | 6581 | int nr,working,insync,failed,spare; |
3cb03002 | 6582 | struct md_rdev *rdev; |
1da177e4 | 6583 | |
1ca69c4b N |
6584 | nr = working = insync = failed = spare = 0; |
6585 | rcu_read_lock(); | |
6586 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6587 | nr++; |
b2d444d7 | 6588 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6589 | failed++; |
6590 | else { | |
6591 | working++; | |
b2d444d7 | 6592 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6593 | insync++; |
b347af81 SL |
6594 | else if (test_bit(Journal, &rdev->flags)) |
6595 | /* TODO: add journal count to md_u.h */ | |
6596 | ; | |
1da177e4 LT |
6597 | else |
6598 | spare++; | |
6599 | } | |
6600 | } | |
1ca69c4b | 6601 | rcu_read_unlock(); |
1da177e4 LT |
6602 | |
6603 | info.major_version = mddev->major_version; | |
6604 | info.minor_version = mddev->minor_version; | |
6605 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6606 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6607 | info.level = mddev->level; |
58c0fed4 AN |
6608 | info.size = mddev->dev_sectors / 2; |
6609 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6610 | info.size = -1; |
1da177e4 LT |
6611 | info.nr_disks = nr; |
6612 | info.raid_disks = mddev->raid_disks; | |
6613 | info.md_minor = mddev->md_minor; | |
6614 | info.not_persistent= !mddev->persistent; | |
6615 | ||
9ebc6ef1 | 6616 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6617 | info.state = 0; |
6618 | if (mddev->in_sync) | |
6619 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6620 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6621 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6622 | if (mddev_is_clustered(mddev)) |
6623 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6624 | info.active_disks = insync; |
1da177e4 LT |
6625 | info.working_disks = working; |
6626 | info.failed_disks = failed; | |
6627 | info.spare_disks = spare; | |
6628 | ||
6629 | info.layout = mddev->layout; | |
9d8f0363 | 6630 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6631 | |
6632 | if (copy_to_user(arg, &info, sizeof(info))) | |
6633 | return -EFAULT; | |
6634 | ||
6635 | return 0; | |
6636 | } | |
6637 | ||
f72ffdd6 | 6638 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6639 | { |
6640 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6641 | char *ptr; |
4af1a041 | 6642 | int err; |
32a7627c | 6643 | |
b6878d9e | 6644 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6645 | if (!file) |
4af1a041 | 6646 | return -ENOMEM; |
32a7627c | 6647 | |
4af1a041 N |
6648 | err = 0; |
6649 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6650 | /* bitmap enabled */ |
6651 | if (mddev->bitmap_info.file) { | |
6652 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6653 | sizeof(file->pathname)); | |
6654 | if (IS_ERR(ptr)) | |
6655 | err = PTR_ERR(ptr); | |
6656 | else | |
6657 | memmove(file->pathname, ptr, | |
6658 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6659 | } | |
4af1a041 | 6660 | spin_unlock(&mddev->lock); |
32a7627c | 6661 | |
4af1a041 N |
6662 | if (err == 0 && |
6663 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6664 | err = -EFAULT; |
4af1a041 | 6665 | |
32a7627c N |
6666 | kfree(file); |
6667 | return err; | |
6668 | } | |
6669 | ||
f72ffdd6 | 6670 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6671 | { |
6672 | mdu_disk_info_t info; | |
3cb03002 | 6673 | struct md_rdev *rdev; |
1da177e4 LT |
6674 | |
6675 | if (copy_from_user(&info, arg, sizeof(info))) | |
6676 | return -EFAULT; | |
6677 | ||
1ca69c4b | 6678 | rcu_read_lock(); |
57d051dc | 6679 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6680 | if (rdev) { |
6681 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6682 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6683 | info.raid_disk = rdev->raid_disk; | |
6684 | info.state = 0; | |
b2d444d7 | 6685 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6686 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6687 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6688 | info.state |= (1<<MD_DISK_ACTIVE); |
6689 | info.state |= (1<<MD_DISK_SYNC); | |
6690 | } | |
9efdca16 | 6691 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6692 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6693 | if (test_bit(WriteMostly, &rdev->flags)) |
6694 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6695 | if (test_bit(FailFast, &rdev->flags)) |
6696 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6697 | } else { |
6698 | info.major = info.minor = 0; | |
6699 | info.raid_disk = -1; | |
6700 | info.state = (1<<MD_DISK_REMOVED); | |
6701 | } | |
1ca69c4b | 6702 | rcu_read_unlock(); |
1da177e4 LT |
6703 | |
6704 | if (copy_to_user(arg, &info, sizeof(info))) | |
6705 | return -EFAULT; | |
6706 | ||
6707 | return 0; | |
6708 | } | |
6709 | ||
f72ffdd6 | 6710 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6711 | { |
6712 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6713 | struct md_rdev *rdev; |
1da177e4 LT |
6714 | dev_t dev = MKDEV(info->major,info->minor); |
6715 | ||
1aee41f6 GR |
6716 | if (mddev_is_clustered(mddev) && |
6717 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6718 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6719 | mdname(mddev)); | |
1aee41f6 GR |
6720 | return -EINVAL; |
6721 | } | |
6722 | ||
1da177e4 LT |
6723 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6724 | return -EOVERFLOW; | |
6725 | ||
6726 | if (!mddev->raid_disks) { | |
6727 | int err; | |
6728 | /* expecting a device which has a superblock */ | |
6729 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6730 | if (IS_ERR(rdev)) { | |
9d48739e | 6731 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6732 | PTR_ERR(rdev)); |
6733 | return PTR_ERR(rdev); | |
6734 | } | |
6735 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6736 | struct md_rdev *rdev0 |
6737 | = list_entry(mddev->disks.next, | |
6738 | struct md_rdev, same_set); | |
a9f326eb | 6739 | err = super_types[mddev->major_version] |
1da177e4 LT |
6740 | .load_super(rdev, rdev0, mddev->minor_version); |
6741 | if (err < 0) { | |
9d48739e | 6742 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6743 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6744 | bdevname(rdev0->bdev,b2)); |
6745 | export_rdev(rdev); | |
6746 | return -EINVAL; | |
6747 | } | |
6748 | } | |
6749 | err = bind_rdev_to_array(rdev, mddev); | |
6750 | if (err) | |
6751 | export_rdev(rdev); | |
6752 | return err; | |
6753 | } | |
6754 | ||
6755 | /* | |
6756 | * add_new_disk can be used once the array is assembled | |
6757 | * to add "hot spares". They must already have a superblock | |
6758 | * written | |
6759 | */ | |
6760 | if (mddev->pers) { | |
6761 | int err; | |
6762 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6763 | pr_warn("%s: personality does not support diskops!\n", |
6764 | mdname(mddev)); | |
1da177e4 LT |
6765 | return -EINVAL; |
6766 | } | |
7b1e35f6 N |
6767 | if (mddev->persistent) |
6768 | rdev = md_import_device(dev, mddev->major_version, | |
6769 | mddev->minor_version); | |
6770 | else | |
6771 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6772 | if (IS_ERR(rdev)) { |
9d48739e | 6773 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6774 | PTR_ERR(rdev)); |
6775 | return PTR_ERR(rdev); | |
6776 | } | |
1a855a06 | 6777 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6778 | if (!mddev->persistent) { |
6779 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6780 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6781 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6782 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6783 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6784 | } else |
41158c7e | 6785 | rdev->raid_disk = -1; |
f466722c | 6786 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6787 | } else |
6788 | super_types[mddev->major_version]. | |
6789 | validate_super(mddev, rdev); | |
bedd86b7 | 6790 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6791 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6792 | /* This was a hot-add request, but events doesn't |
6793 | * match, so reject it. | |
6794 | */ | |
6795 | export_rdev(rdev); | |
6796 | return -EINVAL; | |
6797 | } | |
6798 | ||
b2d444d7 | 6799 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6800 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6801 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6802 | else |
6803 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6804 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6805 | set_bit(FailFast, &rdev->flags); | |
6806 | else | |
6807 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6808 | |
f6b6ec5c SL |
6809 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6810 | struct md_rdev *rdev2; | |
6811 | bool has_journal = false; | |
6812 | ||
6813 | /* make sure no existing journal disk */ | |
6814 | rdev_for_each(rdev2, mddev) { | |
6815 | if (test_bit(Journal, &rdev2->flags)) { | |
6816 | has_journal = true; | |
6817 | break; | |
6818 | } | |
6819 | } | |
230b55fa | 6820 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6821 | export_rdev(rdev); |
6822 | return -EBUSY; | |
6823 | } | |
bac624f3 | 6824 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6825 | } |
1aee41f6 GR |
6826 | /* |
6827 | * check whether the device shows up in other nodes | |
6828 | */ | |
6829 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6830 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6831 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6832 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6833 | /* --add initiated by this node */ |
dbb64f86 | 6834 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6835 | if (err) { |
1aee41f6 GR |
6836 | export_rdev(rdev); |
6837 | return err; | |
6838 | } | |
6839 | } | |
6840 | } | |
6841 | ||
1da177e4 LT |
6842 | rdev->raid_disk = -1; |
6843 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6844 | |
1da177e4 LT |
6845 | if (err) |
6846 | export_rdev(rdev); | |
dbb64f86 GR |
6847 | |
6848 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6849 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6850 | if (!err) { | |
6851 | err = md_cluster_ops->new_disk_ack(mddev, | |
6852 | err == 0); | |
6853 | if (err) | |
6854 | md_kick_rdev_from_array(rdev); | |
6855 | } | |
6856 | } else { | |
dbb64f86 GR |
6857 | if (err) |
6858 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6859 | else | |
6860 | err = add_bound_rdev(rdev); | |
6861 | } | |
6862 | ||
6863 | } else if (!err) | |
a6da4ef8 | 6864 | err = add_bound_rdev(rdev); |
dbb64f86 | 6865 | |
1da177e4 LT |
6866 | return err; |
6867 | } | |
6868 | ||
6869 | /* otherwise, add_new_disk is only allowed | |
6870 | * for major_version==0 superblocks | |
6871 | */ | |
6872 | if (mddev->major_version != 0) { | |
9d48739e | 6873 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6874 | return -EINVAL; |
6875 | } | |
6876 | ||
6877 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6878 | int err; | |
d710e138 | 6879 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6880 | if (IS_ERR(rdev)) { |
9d48739e | 6881 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6882 | PTR_ERR(rdev)); |
6883 | return PTR_ERR(rdev); | |
6884 | } | |
6885 | rdev->desc_nr = info->number; | |
6886 | if (info->raid_disk < mddev->raid_disks) | |
6887 | rdev->raid_disk = info->raid_disk; | |
6888 | else | |
6889 | rdev->raid_disk = -1; | |
6890 | ||
1da177e4 | 6891 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6892 | if (info->state & (1<<MD_DISK_SYNC)) |
6893 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6894 | |
8ddf9efe N |
6895 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6896 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6897 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6898 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6899 | |
1da177e4 | 6900 | if (!mddev->persistent) { |
9d48739e | 6901 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6902 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6903 | } else | |
57b2caa3 | 6904 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6905 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6906 | |
2bf071bf N |
6907 | err = bind_rdev_to_array(rdev, mddev); |
6908 | if (err) { | |
6909 | export_rdev(rdev); | |
6910 | return err; | |
6911 | } | |
1da177e4 LT |
6912 | } |
6913 | ||
6914 | return 0; | |
6915 | } | |
6916 | ||
f72ffdd6 | 6917 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6918 | { |
6919 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6920 | struct md_rdev *rdev; |
1da177e4 | 6921 | |
c42a0e26 YY |
6922 | if (!mddev->pers) |
6923 | return -ENODEV; | |
6924 | ||
1da177e4 LT |
6925 | rdev = find_rdev(mddev, dev); |
6926 | if (!rdev) | |
6927 | return -ENXIO; | |
6928 | ||
2910ff17 GR |
6929 | if (rdev->raid_disk < 0) |
6930 | goto kick_rdev; | |
293467aa | 6931 | |
3ea8929d N |
6932 | clear_bit(Blocked, &rdev->flags); |
6933 | remove_and_add_spares(mddev, rdev); | |
6934 | ||
1da177e4 LT |
6935 | if (rdev->raid_disk >= 0) |
6936 | goto busy; | |
6937 | ||
2910ff17 | 6938 | kick_rdev: |
54a88392 | 6939 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6940 | md_cluster_ops->remove_disk(mddev, rdev); |
6941 | ||
fb56dfef | 6942 | md_kick_rdev_from_array(rdev); |
2953079c | 6943 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6944 | if (mddev->thread) |
6945 | md_wakeup_thread(mddev->thread); | |
6946 | else | |
6947 | md_update_sb(mddev, 1); | |
d7603b7e | 6948 | md_new_event(mddev); |
1da177e4 LT |
6949 | |
6950 | return 0; | |
6951 | busy: | |
9d48739e N |
6952 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6953 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6954 | return -EBUSY; |
6955 | } | |
6956 | ||
f72ffdd6 | 6957 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6958 | { |
6959 | char b[BDEVNAME_SIZE]; | |
6960 | int err; | |
3cb03002 | 6961 | struct md_rdev *rdev; |
1da177e4 LT |
6962 | |
6963 | if (!mddev->pers) | |
6964 | return -ENODEV; | |
6965 | ||
6966 | if (mddev->major_version != 0) { | |
9d48739e | 6967 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6968 | mdname(mddev)); |
6969 | return -EINVAL; | |
6970 | } | |
6971 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6972 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6973 | mdname(mddev)); |
6974 | return -EINVAL; | |
6975 | } | |
6976 | ||
d710e138 | 6977 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6978 | if (IS_ERR(rdev)) { |
9d48739e | 6979 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6980 | PTR_ERR(rdev)); |
6981 | return -EINVAL; | |
6982 | } | |
6983 | ||
6984 | if (mddev->persistent) | |
57b2caa3 | 6985 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6986 | else |
77304d2a | 6987 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6988 | |
8190e754 | 6989 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6990 | |
b2d444d7 | 6991 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6992 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6993 | bdevname(rdev->bdev,b), mdname(mddev)); |
6994 | err = -EINVAL; | |
6995 | goto abort_export; | |
6996 | } | |
293467aa | 6997 | |
b2d444d7 | 6998 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6999 | rdev->desc_nr = -1; |
5842730d | 7000 | rdev->saved_raid_disk = -1; |
2bf071bf N |
7001 | err = bind_rdev_to_array(rdev, mddev); |
7002 | if (err) | |
2aa82191 | 7003 | goto abort_export; |
1da177e4 LT |
7004 | |
7005 | /* | |
7006 | * The rest should better be atomic, we can have disk failures | |
7007 | * noticed in interrupt contexts ... | |
7008 | */ | |
7009 | ||
1da177e4 LT |
7010 | rdev->raid_disk = -1; |
7011 | ||
2953079c | 7012 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
7013 | if (!mddev->thread) |
7014 | md_update_sb(mddev, 1); | |
1da177e4 LT |
7015 | /* |
7016 | * Kick recovery, maybe this spare has to be added to the | |
7017 | * array immediately. | |
7018 | */ | |
7019 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7020 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 7021 | md_new_event(mddev); |
1da177e4 LT |
7022 | return 0; |
7023 | ||
1da177e4 LT |
7024 | abort_export: |
7025 | export_rdev(rdev); | |
7026 | return err; | |
7027 | } | |
7028 | ||
fd01b88c | 7029 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 7030 | { |
035328c2 | 7031 | int err = 0; |
32a7627c | 7032 | |
36fa3063 | 7033 | if (mddev->pers) { |
d66b1b39 | 7034 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
7035 | return -EBUSY; |
7036 | if (mddev->recovery || mddev->sync_thread) | |
7037 | return -EBUSY; | |
7038 | /* we should be able to change the bitmap.. */ | |
7039 | } | |
32a7627c | 7040 | |
36fa3063 | 7041 | if (fd >= 0) { |
035328c2 | 7042 | struct inode *inode; |
1e594bb2 N |
7043 | struct file *f; |
7044 | ||
7045 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 7046 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 7047 | f = fget(fd); |
32a7627c | 7048 | |
1e594bb2 | 7049 | if (f == NULL) { |
9d48739e N |
7050 | pr_warn("%s: error: failed to get bitmap file\n", |
7051 | mdname(mddev)); | |
36fa3063 N |
7052 | return -EBADF; |
7053 | } | |
7054 | ||
1e594bb2 | 7055 | inode = f->f_mapping->host; |
035328c2 | 7056 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
7057 | pr_warn("%s: error: bitmap file must be a regular file\n", |
7058 | mdname(mddev)); | |
035328c2 | 7059 | err = -EBADF; |
1e594bb2 | 7060 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
7061 | pr_warn("%s: error: bitmap file must open for write\n", |
7062 | mdname(mddev)); | |
035328c2 N |
7063 | err = -EBADF; |
7064 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
7065 | pr_warn("%s: error: bitmap file is already in use\n", |
7066 | mdname(mddev)); | |
035328c2 N |
7067 | err = -EBUSY; |
7068 | } | |
7069 | if (err) { | |
1e594bb2 | 7070 | fput(f); |
36fa3063 N |
7071 | return err; |
7072 | } | |
1e594bb2 | 7073 | mddev->bitmap_info.file = f; |
c3d9714e | 7074 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
7075 | } else if (mddev->bitmap == NULL) |
7076 | return -ENOENT; /* cannot remove what isn't there */ | |
7077 | err = 0; | |
7078 | if (mddev->pers) { | |
69e51b44 | 7079 | if (fd >= 0) { |
f9209a32 GR |
7080 | struct bitmap *bitmap; |
7081 | ||
e64e4018 | 7082 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7083 | mddev_suspend(mddev); |
f9209a32 GR |
7084 | if (!IS_ERR(bitmap)) { |
7085 | mddev->bitmap = bitmap; | |
e64e4018 | 7086 | err = md_bitmap_load(mddev); |
ba599aca N |
7087 | } else |
7088 | err = PTR_ERR(bitmap); | |
52a0d49d | 7089 | if (err) { |
e64e4018 | 7090 | md_bitmap_destroy(mddev); |
52a0d49d N |
7091 | fd = -1; |
7092 | } | |
9e1cc0a5 | 7093 | mddev_resume(mddev); |
52a0d49d | 7094 | } else if (fd < 0) { |
9e1cc0a5 | 7095 | mddev_suspend(mddev); |
e64e4018 | 7096 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7097 | mddev_resume(mddev); |
d7375ab3 | 7098 | } |
d7375ab3 N |
7099 | } |
7100 | if (fd < 0) { | |
4af1a041 N |
7101 | struct file *f = mddev->bitmap_info.file; |
7102 | if (f) { | |
7103 | spin_lock(&mddev->lock); | |
7104 | mddev->bitmap_info.file = NULL; | |
7105 | spin_unlock(&mddev->lock); | |
7106 | fput(f); | |
7107 | } | |
36fa3063 N |
7108 | } |
7109 | ||
32a7627c N |
7110 | return err; |
7111 | } | |
7112 | ||
1da177e4 LT |
7113 | /* |
7114 | * set_array_info is used two different ways | |
7115 | * The original usage is when creating a new array. | |
7116 | * In this usage, raid_disks is > 0 and it together with | |
7117 | * level, size, not_persistent,layout,chunksize determine the | |
7118 | * shape of the array. | |
7119 | * This will always create an array with a type-0.90.0 superblock. | |
7120 | * The newer usage is when assembling an array. | |
7121 | * In this case raid_disks will be 0, and the major_version field is | |
7122 | * use to determine which style super-blocks are to be found on the devices. | |
7123 | * The minor and patch _version numbers are also kept incase the | |
7124 | * super_block handler wishes to interpret them. | |
7125 | */ | |
f72ffdd6 | 7126 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7127 | { |
7128 | ||
7129 | if (info->raid_disks == 0) { | |
7130 | /* just setting version number for superblock loading */ | |
7131 | if (info->major_version < 0 || | |
50511da3 | 7132 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
7133 | super_types[info->major_version].name == NULL) { |
7134 | /* maybe try to auto-load a module? */ | |
9d48739e | 7135 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
7136 | info->major_version); |
7137 | return -EINVAL; | |
7138 | } | |
7139 | mddev->major_version = info->major_version; | |
7140 | mddev->minor_version = info->minor_version; | |
7141 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 7142 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
7143 | /* ensure mddev_put doesn't delete this now that there |
7144 | * is some minimal configuration. | |
7145 | */ | |
9ebc6ef1 | 7146 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7147 | return 0; |
7148 | } | |
7149 | mddev->major_version = MD_MAJOR_VERSION; | |
7150 | mddev->minor_version = MD_MINOR_VERSION; | |
7151 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 7152 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
7153 | |
7154 | mddev->level = info->level; | |
17115e03 | 7155 | mddev->clevel[0] = 0; |
58c0fed4 | 7156 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
7157 | mddev->raid_disks = info->raid_disks; |
7158 | /* don't set md_minor, it is determined by which /dev/md* was | |
7159 | * openned | |
7160 | */ | |
7161 | if (info->state & (1<<MD_SB_CLEAN)) | |
7162 | mddev->recovery_cp = MaxSector; | |
7163 | else | |
7164 | mddev->recovery_cp = 0; | |
7165 | mddev->persistent = ! info->not_persistent; | |
e691063a | 7166 | mddev->external = 0; |
1da177e4 LT |
7167 | |
7168 | mddev->layout = info->layout; | |
33f2c35a N |
7169 | if (mddev->level == 0) |
7170 | /* Cannot trust RAID0 layout info here */ | |
7171 | mddev->layout = -1; | |
9d8f0363 | 7172 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 7173 | |
2953079c | 7174 | if (mddev->persistent) { |
1b3bae49 N |
7175 | mddev->max_disks = MD_SB_DISKS; |
7176 | mddev->flags = 0; | |
7177 | mddev->sb_flags = 0; | |
2953079c SL |
7178 | } |
7179 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 7180 | |
c3d9714e | 7181 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 7182 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 7183 | mddev->bitmap_info.offset = 0; |
b2a2703c | 7184 | |
f6705578 N |
7185 | mddev->reshape_position = MaxSector; |
7186 | ||
1da177e4 LT |
7187 | /* |
7188 | * Generate a 128 bit UUID | |
7189 | */ | |
7190 | get_random_bytes(mddev->uuid, 16); | |
7191 | ||
f6705578 | 7192 | mddev->new_level = mddev->level; |
664e7c41 | 7193 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
7194 | mddev->new_layout = mddev->layout; |
7195 | mddev->delta_disks = 0; | |
2c810cdd | 7196 | mddev->reshape_backwards = 0; |
f6705578 | 7197 | |
1da177e4 LT |
7198 | return 0; |
7199 | } | |
7200 | ||
fd01b88c | 7201 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 7202 | { |
efa4b77b | 7203 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
7204 | |
7205 | if (mddev->external_size) | |
7206 | return; | |
7207 | ||
1f403624 DW |
7208 | mddev->array_sectors = array_sectors; |
7209 | } | |
7210 | EXPORT_SYMBOL(md_set_array_sectors); | |
7211 | ||
fd01b88c | 7212 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 7213 | { |
3cb03002 | 7214 | struct md_rdev *rdev; |
a35b0d69 | 7215 | int rv; |
d71f9f88 | 7216 | int fit = (num_sectors == 0); |
818da59f | 7217 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7218 | |
a35b0d69 N |
7219 | if (mddev->pers->resize == NULL) |
7220 | return -EINVAL; | |
d71f9f88 AN |
7221 | /* The "num_sectors" is the number of sectors of each device that |
7222 | * is used. This can only make sense for arrays with redundancy. | |
7223 | * linear and raid0 always use whatever space is available. We can only | |
7224 | * consider changing this number if no resync or reconstruction is | |
7225 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7226 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7227 | * of each device. If num_sectors is zero, we find the largest size |
7228 | * that fits. | |
a35b0d69 | 7229 | */ |
f851b60d N |
7230 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7231 | mddev->sync_thread) | |
a35b0d69 | 7232 | return -EBUSY; |
bd8839e0 N |
7233 | if (mddev->ro) |
7234 | return -EROFS; | |
a4a6125a | 7235 | |
dafb20fa | 7236 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7237 | sector_t avail = rdev->sectors; |
01ab5662 | 7238 | |
d71f9f88 AN |
7239 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7240 | num_sectors = avail; | |
7241 | if (avail < num_sectors) | |
a35b0d69 N |
7242 | return -ENOSPC; |
7243 | } | |
d71f9f88 | 7244 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7245 | if (!rv) { |
818da59f GJ |
7246 | if (mddev_is_clustered(mddev)) |
7247 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7248 | else if (mddev->queue) { | |
c9483634 GJ |
7249 | set_capacity(mddev->gendisk, mddev->array_sectors); |
7250 | revalidate_disk(mddev->gendisk); | |
7251 | } | |
7252 | } | |
a35b0d69 N |
7253 | return rv; |
7254 | } | |
7255 | ||
fd01b88c | 7256 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7257 | { |
7258 | int rv; | |
c6563a8c | 7259 | struct md_rdev *rdev; |
da943b99 | 7260 | /* change the number of raid disks */ |
63c70c4f | 7261 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7262 | return -EINVAL; |
bd8839e0 N |
7263 | if (mddev->ro) |
7264 | return -EROFS; | |
da943b99 | 7265 | if (raid_disks <= 0 || |
233fca36 | 7266 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7267 | return -EINVAL; |
f851b60d N |
7268 | if (mddev->sync_thread || |
7269 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
7270 | mddev->reshape_position != MaxSector) | |
da943b99 | 7271 | return -EBUSY; |
c6563a8c N |
7272 | |
7273 | rdev_for_each(rdev, mddev) { | |
7274 | if (mddev->raid_disks < raid_disks && | |
7275 | rdev->data_offset < rdev->new_data_offset) | |
7276 | return -EINVAL; | |
7277 | if (mddev->raid_disks > raid_disks && | |
7278 | rdev->data_offset > rdev->new_data_offset) | |
7279 | return -EINVAL; | |
7280 | } | |
7281 | ||
63c70c4f | 7282 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7283 | if (mddev->delta_disks < 0) |
7284 | mddev->reshape_backwards = 1; | |
7285 | else if (mddev->delta_disks > 0) | |
7286 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7287 | |
7288 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7289 | if (rv < 0) { |
de171cb9 | 7290 | mddev->delta_disks = 0; |
2c810cdd N |
7291 | mddev->reshape_backwards = 0; |
7292 | } | |
da943b99 N |
7293 | return rv; |
7294 | } | |
7295 | ||
1da177e4 LT |
7296 | /* |
7297 | * update_array_info is used to change the configuration of an | |
7298 | * on-line array. | |
7299 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7300 | * fields in the info are checked against the array. | |
7301 | * Any differences that cannot be handled will cause an error. | |
7302 | * Normally, only one change can be managed at a time. | |
7303 | */ | |
fd01b88c | 7304 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7305 | { |
7306 | int rv = 0; | |
7307 | int cnt = 0; | |
36fa3063 N |
7308 | int state = 0; |
7309 | ||
7310 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7311 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7312 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7313 | |
7314 | if (mddev->major_version != info->major_version || | |
7315 | mddev->minor_version != info->minor_version || | |
7316 | /* mddev->patch_version != info->patch_version || */ | |
7317 | mddev->ctime != info->ctime || | |
7318 | mddev->level != info->level || | |
7319 | /* mddev->layout != info->layout || */ | |
4e023612 | 7320 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7321 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7322 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7323 | ((state^info->state) & 0xfffffe00) | |
7324 | ) | |
1da177e4 LT |
7325 | return -EINVAL; |
7326 | /* Check there is only one change */ | |
58c0fed4 AN |
7327 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7328 | cnt++; | |
7329 | if (mddev->raid_disks != info->raid_disks) | |
7330 | cnt++; | |
7331 | if (mddev->layout != info->layout) | |
7332 | cnt++; | |
7333 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7334 | cnt++; | |
7335 | if (cnt == 0) | |
7336 | return 0; | |
7337 | if (cnt > 1) | |
7338 | return -EINVAL; | |
1da177e4 LT |
7339 | |
7340 | if (mddev->layout != info->layout) { | |
7341 | /* Change layout | |
7342 | * we don't need to do anything at the md level, the | |
7343 | * personality will take care of it all. | |
7344 | */ | |
50ac168a | 7345 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7346 | return -EINVAL; |
597a711b N |
7347 | else { |
7348 | mddev->new_layout = info->layout; | |
50ac168a | 7349 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7350 | if (rv) |
7351 | mddev->new_layout = mddev->layout; | |
7352 | return rv; | |
7353 | } | |
1da177e4 | 7354 | } |
58c0fed4 | 7355 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7356 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7357 | |
da943b99 N |
7358 | if (mddev->raid_disks != info->raid_disks) |
7359 | rv = update_raid_disks(mddev, info->raid_disks); | |
7360 | ||
36fa3063 | 7361 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7362 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7363 | rv = -EINVAL; | |
7364 | goto err; | |
7365 | } | |
7366 | if (mddev->recovery || mddev->sync_thread) { | |
7367 | rv = -EBUSY; | |
7368 | goto err; | |
7369 | } | |
36fa3063 | 7370 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7371 | struct bitmap *bitmap; |
36fa3063 | 7372 | /* add the bitmap */ |
293467aa GR |
7373 | if (mddev->bitmap) { |
7374 | rv = -EEXIST; | |
7375 | goto err; | |
7376 | } | |
7377 | if (mddev->bitmap_info.default_offset == 0) { | |
7378 | rv = -EINVAL; | |
7379 | goto err; | |
7380 | } | |
c3d9714e N |
7381 | mddev->bitmap_info.offset = |
7382 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7383 | mddev->bitmap_info.space = |
7384 | mddev->bitmap_info.default_space; | |
e64e4018 | 7385 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7386 | mddev_suspend(mddev); |
f9209a32 GR |
7387 | if (!IS_ERR(bitmap)) { |
7388 | mddev->bitmap = bitmap; | |
e64e4018 | 7389 | rv = md_bitmap_load(mddev); |
ba599aca N |
7390 | } else |
7391 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7392 | if (rv) |
e64e4018 | 7393 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7394 | mddev_resume(mddev); |
36fa3063 N |
7395 | } else { |
7396 | /* remove the bitmap */ | |
293467aa GR |
7397 | if (!mddev->bitmap) { |
7398 | rv = -ENOENT; | |
7399 | goto err; | |
7400 | } | |
7401 | if (mddev->bitmap->storage.file) { | |
7402 | rv = -EINVAL; | |
7403 | goto err; | |
7404 | } | |
f6a2dc64 GJ |
7405 | if (mddev->bitmap_info.nodes) { |
7406 | /* hold PW on all the bitmap lock */ | |
7407 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7408 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7409 | rv = -EPERM; |
7410 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7411 | goto err; | |
7412 | } | |
7413 | ||
7414 | mddev->bitmap_info.nodes = 0; | |
7415 | md_cluster_ops->leave(mddev); | |
7416 | } | |
9e1cc0a5 | 7417 | mddev_suspend(mddev); |
e64e4018 | 7418 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7419 | mddev_resume(mddev); |
c3d9714e | 7420 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7421 | } |
7422 | } | |
850b2b42 | 7423 | md_update_sb(mddev, 1); |
293467aa GR |
7424 | return rv; |
7425 | err: | |
1da177e4 LT |
7426 | return rv; |
7427 | } | |
7428 | ||
fd01b88c | 7429 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7430 | { |
3cb03002 | 7431 | struct md_rdev *rdev; |
1ca69c4b | 7432 | int err = 0; |
1da177e4 LT |
7433 | |
7434 | if (mddev->pers == NULL) | |
7435 | return -ENODEV; | |
7436 | ||
1ca69c4b | 7437 | rcu_read_lock(); |
1532d9e8 | 7438 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7439 | if (!rdev) |
1ca69c4b N |
7440 | err = -ENODEV; |
7441 | else { | |
7442 | md_error(mddev, rdev); | |
7443 | if (!test_bit(Faulty, &rdev->flags)) | |
7444 | err = -EBUSY; | |
7445 | } | |
7446 | rcu_read_unlock(); | |
7447 | return err; | |
1da177e4 LT |
7448 | } |
7449 | ||
2f9618ce AN |
7450 | /* |
7451 | * We have a problem here : there is no easy way to give a CHS | |
7452 | * virtual geometry. We currently pretend that we have a 2 heads | |
7453 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7454 | * dosfs just mad... ;-) | |
7455 | */ | |
a885c8c4 CH |
7456 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7457 | { | |
fd01b88c | 7458 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7459 | |
7460 | geo->heads = 2; | |
7461 | geo->sectors = 4; | |
49ce6cea | 7462 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7463 | return 0; |
7464 | } | |
7465 | ||
cb335f88 NS |
7466 | static inline bool md_ioctl_valid(unsigned int cmd) |
7467 | { | |
7468 | switch (cmd) { | |
7469 | case ADD_NEW_DISK: | |
7470 | case BLKROSET: | |
7471 | case GET_ARRAY_INFO: | |
7472 | case GET_BITMAP_FILE: | |
7473 | case GET_DISK_INFO: | |
7474 | case HOT_ADD_DISK: | |
7475 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7476 | case RAID_AUTORUN: |
7477 | case RAID_VERSION: | |
7478 | case RESTART_ARRAY_RW: | |
7479 | case RUN_ARRAY: | |
7480 | case SET_ARRAY_INFO: | |
7481 | case SET_BITMAP_FILE: | |
7482 | case SET_DISK_FAULTY: | |
7483 | case STOP_ARRAY: | |
7484 | case STOP_ARRAY_RO: | |
1aee41f6 | 7485 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7486 | return true; |
7487 | default: | |
7488 | return false; | |
7489 | } | |
7490 | } | |
7491 | ||
a39907fa | 7492 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7493 | unsigned int cmd, unsigned long arg) |
7494 | { | |
7495 | int err = 0; | |
7496 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7497 | struct mddev *mddev = NULL; |
e2218350 | 7498 | int ro; |
065e519e | 7499 | bool did_set_md_closing = false; |
1da177e4 | 7500 | |
cb335f88 NS |
7501 | if (!md_ioctl_valid(cmd)) |
7502 | return -ENOTTY; | |
7503 | ||
506c9e44 N |
7504 | switch (cmd) { |
7505 | case RAID_VERSION: | |
7506 | case GET_ARRAY_INFO: | |
7507 | case GET_DISK_INFO: | |
7508 | break; | |
7509 | default: | |
7510 | if (!capable(CAP_SYS_ADMIN)) | |
7511 | return -EACCES; | |
7512 | } | |
1da177e4 LT |
7513 | |
7514 | /* | |
7515 | * Commands dealing with the RAID driver but not any | |
7516 | * particular array: | |
7517 | */ | |
c02c0aeb N |
7518 | switch (cmd) { |
7519 | case RAID_VERSION: | |
7520 | err = get_version(argp); | |
3adc28d8 | 7521 | goto out; |
1da177e4 | 7522 | |
1da177e4 | 7523 | #ifndef MODULE |
c02c0aeb N |
7524 | case RAID_AUTORUN: |
7525 | err = 0; | |
7526 | autostart_arrays(arg); | |
3adc28d8 | 7527 | goto out; |
1da177e4 | 7528 | #endif |
c02c0aeb | 7529 | default:; |
1da177e4 LT |
7530 | } |
7531 | ||
7532 | /* | |
7533 | * Commands creating/starting a new array: | |
7534 | */ | |
7535 | ||
a39907fa | 7536 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7537 | |
7538 | if (!mddev) { | |
7539 | BUG(); | |
3adc28d8 | 7540 | goto out; |
1da177e4 LT |
7541 | } |
7542 | ||
1ca69c4b N |
7543 | /* Some actions do not requires the mutex */ |
7544 | switch (cmd) { | |
7545 | case GET_ARRAY_INFO: | |
7546 | if (!mddev->raid_disks && !mddev->external) | |
7547 | err = -ENODEV; | |
7548 | else | |
7549 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7550 | goto out; |
1ca69c4b N |
7551 | |
7552 | case GET_DISK_INFO: | |
7553 | if (!mddev->raid_disks && !mddev->external) | |
7554 | err = -ENODEV; | |
7555 | else | |
7556 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7557 | goto out; |
1ca69c4b N |
7558 | |
7559 | case SET_DISK_FAULTY: | |
7560 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7561 | goto out; |
4af1a041 N |
7562 | |
7563 | case GET_BITMAP_FILE: | |
7564 | err = get_bitmap_file(mddev, argp); | |
7565 | goto out; | |
7566 | ||
1ca69c4b N |
7567 | } |
7568 | ||
78b990cf | 7569 | if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) |
cc1ffe61 | 7570 | flush_rdev_wq(mddev); |
a7a3f08d | 7571 | |
90f5f7ad HR |
7572 | if (cmd == HOT_REMOVE_DISK) |
7573 | /* need to ensure recovery thread has run */ | |
7574 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7575 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7576 | &mddev->recovery), |
90f5f7ad | 7577 | msecs_to_jiffies(5000)); |
260fa034 N |
7578 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7579 | /* Need to flush page cache, and ensure no-one else opens | |
7580 | * and writes | |
7581 | */ | |
7582 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7583 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7584 | mutex_unlock(&mddev->open_mutex); |
7585 | err = -EBUSY; | |
3adc28d8 | 7586 | goto out; |
260fa034 | 7587 | } |
065e519e | 7588 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7589 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7590 | did_set_md_closing = true; |
260fa034 N |
7591 | mutex_unlock(&mddev->open_mutex); |
7592 | sync_blockdev(bdev); | |
7593 | } | |
1da177e4 LT |
7594 | err = mddev_lock(mddev); |
7595 | if (err) { | |
9d48739e N |
7596 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7597 | err, cmd); | |
3adc28d8 | 7598 | goto out; |
1da177e4 LT |
7599 | } |
7600 | ||
c02c0aeb N |
7601 | if (cmd == SET_ARRAY_INFO) { |
7602 | mdu_array_info_t info; | |
7603 | if (!arg) | |
7604 | memset(&info, 0, sizeof(info)); | |
7605 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7606 | err = -EFAULT; | |
3adc28d8 | 7607 | goto unlock; |
c02c0aeb N |
7608 | } |
7609 | if (mddev->pers) { | |
7610 | err = update_array_info(mddev, &info); | |
7611 | if (err) { | |
9d48739e | 7612 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7613 | goto unlock; |
1da177e4 | 7614 | } |
3adc28d8 | 7615 | goto unlock; |
c02c0aeb N |
7616 | } |
7617 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7618 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7619 | err = -EBUSY; |
3adc28d8 | 7620 | goto unlock; |
c02c0aeb N |
7621 | } |
7622 | if (mddev->raid_disks) { | |
9d48739e | 7623 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7624 | err = -EBUSY; |
3adc28d8 | 7625 | goto unlock; |
c02c0aeb N |
7626 | } |
7627 | err = set_array_info(mddev, &info); | |
7628 | if (err) { | |
9d48739e | 7629 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7630 | goto unlock; |
c02c0aeb | 7631 | } |
3adc28d8 | 7632 | goto unlock; |
1da177e4 LT |
7633 | } |
7634 | ||
7635 | /* | |
7636 | * Commands querying/configuring an existing array: | |
7637 | */ | |
32a7627c | 7638 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7639 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7640 | if ((!mddev->raid_disks && !mddev->external) |
7641 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7642 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7643 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7644 | err = -ENODEV; |
3adc28d8 | 7645 | goto unlock; |
1da177e4 LT |
7646 | } |
7647 | ||
7648 | /* | |
7649 | * Commands even a read-only array can execute: | |
7650 | */ | |
c02c0aeb | 7651 | switch (cmd) { |
c02c0aeb N |
7652 | case RESTART_ARRAY_RW: |
7653 | err = restart_array(mddev); | |
3adc28d8 | 7654 | goto unlock; |
1da177e4 | 7655 | |
c02c0aeb N |
7656 | case STOP_ARRAY: |
7657 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7658 | goto unlock; |
1da177e4 | 7659 | |
c02c0aeb N |
7660 | case STOP_ARRAY_RO: |
7661 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7662 | goto unlock; |
1da177e4 | 7663 | |
3ea8929d N |
7664 | case HOT_REMOVE_DISK: |
7665 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7666 | goto unlock; |
3ea8929d | 7667 | |
7ceb17e8 N |
7668 | case ADD_NEW_DISK: |
7669 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7670 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7671 | * So require mddev->pers and MD_DISK_SYNC. |
7672 | */ | |
7673 | if (mddev->pers) { | |
7674 | mdu_disk_info_t info; | |
7675 | if (copy_from_user(&info, argp, sizeof(info))) | |
7676 | err = -EFAULT; | |
7677 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7678 | /* Need to clear read-only for this */ | |
7679 | break; | |
7680 | else | |
7681 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7682 | goto unlock; |
7ceb17e8 N |
7683 | } |
7684 | break; | |
7685 | ||
c02c0aeb N |
7686 | case BLKROSET: |
7687 | if (get_user(ro, (int __user *)(arg))) { | |
7688 | err = -EFAULT; | |
3adc28d8 | 7689 | goto unlock; |
c02c0aeb N |
7690 | } |
7691 | err = -EINVAL; | |
e2218350 | 7692 | |
c02c0aeb N |
7693 | /* if the bdev is going readonly the value of mddev->ro |
7694 | * does not matter, no writes are coming | |
7695 | */ | |
7696 | if (ro) | |
3adc28d8 | 7697 | goto unlock; |
e2218350 | 7698 | |
c02c0aeb N |
7699 | /* are we are already prepared for writes? */ |
7700 | if (mddev->ro != 1) | |
3adc28d8 | 7701 | goto unlock; |
e2218350 | 7702 | |
c02c0aeb N |
7703 | /* transitioning to readauto need only happen for |
7704 | * arrays that call md_write_start | |
7705 | */ | |
7706 | if (mddev->pers) { | |
7707 | err = restart_array(mddev); | |
7708 | if (err == 0) { | |
7709 | mddev->ro = 2; | |
7710 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7711 | } |
c02c0aeb | 7712 | } |
3adc28d8 | 7713 | goto unlock; |
1da177e4 LT |
7714 | } |
7715 | ||
7716 | /* | |
7717 | * The remaining ioctls are changing the state of the | |
f91de92e | 7718 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7719 | */ |
326eb17d | 7720 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7721 | if (mddev->ro == 2) { |
7722 | mddev->ro = 0; | |
00bcb4ac | 7723 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7724 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7725 | /* mddev_unlock will wake thread */ |
7726 | /* If a device failed while we were read-only, we | |
7727 | * need to make sure the metadata is updated now. | |
7728 | */ | |
2953079c | 7729 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7730 | mddev_unlock(mddev); |
7731 | wait_event(mddev->sb_wait, | |
2953079c SL |
7732 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7733 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7734 | mddev_lock_nointr(mddev); |
f3378b48 | 7735 | } |
f91de92e N |
7736 | } else { |
7737 | err = -EROFS; | |
3adc28d8 | 7738 | goto unlock; |
f91de92e | 7739 | } |
1da177e4 LT |
7740 | } |
7741 | ||
c02c0aeb N |
7742 | switch (cmd) { |
7743 | case ADD_NEW_DISK: | |
1da177e4 | 7744 | { |
c02c0aeb N |
7745 | mdu_disk_info_t info; |
7746 | if (copy_from_user(&info, argp, sizeof(info))) | |
7747 | err = -EFAULT; | |
7748 | else | |
7749 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7750 | goto unlock; |
c02c0aeb | 7751 | } |
1da177e4 | 7752 | |
1aee41f6 GR |
7753 | case CLUSTERED_DISK_NACK: |
7754 | if (mddev_is_clustered(mddev)) | |
7755 | md_cluster_ops->new_disk_ack(mddev, false); | |
7756 | else | |
7757 | err = -EINVAL; | |
7758 | goto unlock; | |
7759 | ||
c02c0aeb N |
7760 | case HOT_ADD_DISK: |
7761 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7762 | goto unlock; |
1da177e4 | 7763 | |
c02c0aeb N |
7764 | case RUN_ARRAY: |
7765 | err = do_md_run(mddev); | |
3adc28d8 | 7766 | goto unlock; |
1da177e4 | 7767 | |
c02c0aeb N |
7768 | case SET_BITMAP_FILE: |
7769 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7770 | goto unlock; |
32a7627c | 7771 | |
c02c0aeb N |
7772 | default: |
7773 | err = -EINVAL; | |
3adc28d8 | 7774 | goto unlock; |
1da177e4 LT |
7775 | } |
7776 | ||
3adc28d8 | 7777 | unlock: |
d3374825 N |
7778 | if (mddev->hold_active == UNTIL_IOCTL && |
7779 | err != -EINVAL) | |
7780 | mddev->hold_active = 0; | |
1da177e4 | 7781 | mddev_unlock(mddev); |
3adc28d8 | 7782 | out: |
065e519e N |
7783 | if(did_set_md_closing) |
7784 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7785 | return err; |
7786 | } | |
aa98aa31 AB |
7787 | #ifdef CONFIG_COMPAT |
7788 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7789 | unsigned int cmd, unsigned long arg) | |
7790 | { | |
7791 | switch (cmd) { | |
7792 | case HOT_REMOVE_DISK: | |
7793 | case HOT_ADD_DISK: | |
7794 | case SET_DISK_FAULTY: | |
7795 | case SET_BITMAP_FILE: | |
7796 | /* These take in integer arg, do not convert */ | |
7797 | break; | |
7798 | default: | |
7799 | arg = (unsigned long)compat_ptr(arg); | |
7800 | break; | |
7801 | } | |
7802 | ||
7803 | return md_ioctl(bdev, mode, cmd, arg); | |
7804 | } | |
7805 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7806 | |
a39907fa | 7807 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7808 | { |
7809 | /* | |
7810 | * Succeed if we can lock the mddev, which confirms that | |
7811 | * it isn't being stopped right now. | |
7812 | */ | |
fd01b88c | 7813 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7814 | int err; |
7815 | ||
0c098220 YL |
7816 | if (!mddev) |
7817 | return -ENODEV; | |
7818 | ||
d3374825 N |
7819 | if (mddev->gendisk != bdev->bd_disk) { |
7820 | /* we are racing with mddev_put which is discarding this | |
7821 | * bd_disk. | |
7822 | */ | |
7823 | mddev_put(mddev); | |
7824 | /* Wait until bdev->bd_disk is definitely gone */ | |
f6766ff6 GJ |
7825 | if (work_pending(&mddev->del_work)) |
7826 | flush_workqueue(md_misc_wq); | |
d3374825 N |
7827 | /* Then retry the open from the top */ |
7828 | return -ERESTARTSYS; | |
7829 | } | |
7830 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7831 | ||
c8c00a69 | 7832 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7833 | goto out; |
7834 | ||
af8d8e6f GJ |
7835 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7836 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7837 | err = -ENODEV; |
7838 | goto out; | |
af8d8e6f GJ |
7839 | } |
7840 | ||
1da177e4 | 7841 | err = 0; |
f2ea68cf | 7842 | atomic_inc(&mddev->openers); |
c8c00a69 | 7843 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7844 | |
f0b4f7e2 | 7845 | check_disk_change(bdev); |
1da177e4 | 7846 | out: |
e2342ca8 N |
7847 | if (err) |
7848 | mddev_put(mddev); | |
1da177e4 LT |
7849 | return err; |
7850 | } | |
7851 | ||
db2a144b | 7852 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7853 | { |
f72ffdd6 | 7854 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7855 | |
52e5f9d1 | 7856 | BUG_ON(!mddev); |
f2ea68cf | 7857 | atomic_dec(&mddev->openers); |
1da177e4 | 7858 | mddev_put(mddev); |
1da177e4 | 7859 | } |
f0b4f7e2 N |
7860 | |
7861 | static int md_media_changed(struct gendisk *disk) | |
7862 | { | |
fd01b88c | 7863 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7864 | |
7865 | return mddev->changed; | |
7866 | } | |
7867 | ||
7868 | static int md_revalidate(struct gendisk *disk) | |
7869 | { | |
fd01b88c | 7870 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7871 | |
7872 | mddev->changed = 0; | |
7873 | return 0; | |
7874 | } | |
83d5cde4 | 7875 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7876 | { |
7877 | .owner = THIS_MODULE, | |
c62b37d9 | 7878 | .submit_bio = md_submit_bio, |
a39907fa AV |
7879 | .open = md_open, |
7880 | .release = md_release, | |
b492b852 | 7881 | .ioctl = md_ioctl, |
aa98aa31 AB |
7882 | #ifdef CONFIG_COMPAT |
7883 | .compat_ioctl = md_compat_ioctl, | |
7884 | #endif | |
a885c8c4 | 7885 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7886 | .media_changed = md_media_changed, |
7887 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7888 | }; |
7889 | ||
f72ffdd6 | 7890 | static int md_thread(void *arg) |
1da177e4 | 7891 | { |
2b8bf345 | 7892 | struct md_thread *thread = arg; |
1da177e4 | 7893 | |
1da177e4 LT |
7894 | /* |
7895 | * md_thread is a 'system-thread', it's priority should be very | |
7896 | * high. We avoid resource deadlocks individually in each | |
7897 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7898 | * the very same RT priority as kswapd, thus we will never get | |
7899 | * into a priority inversion deadlock. | |
7900 | * | |
7901 | * we definitely have to have equal or higher priority than | |
7902 | * bdflush, otherwise bdflush will deadlock if there are too | |
7903 | * many dirty RAID5 blocks. | |
7904 | */ | |
1da177e4 | 7905 | |
6985c43f | 7906 | allow_signal(SIGKILL); |
a6fb0934 | 7907 | while (!kthread_should_stop()) { |
1da177e4 | 7908 | |
93588e22 N |
7909 | /* We need to wait INTERRUPTIBLE so that |
7910 | * we don't add to the load-average. | |
7911 | * That means we need to be sure no signals are | |
7912 | * pending | |
7913 | */ | |
7914 | if (signal_pending(current)) | |
7915 | flush_signals(current); | |
7916 | ||
7917 | wait_event_interruptible_timeout | |
7918 | (thread->wqueue, | |
7919 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7920 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7921 | thread->timeout); |
1da177e4 | 7922 | |
6c987910 | 7923 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7924 | if (kthread_should_park()) |
7925 | kthread_parkme(); | |
6c987910 | 7926 | if (!kthread_should_stop()) |
4ed8731d | 7927 | thread->run(thread); |
1da177e4 | 7928 | } |
a6fb0934 | 7929 | |
1da177e4 LT |
7930 | return 0; |
7931 | } | |
7932 | ||
2b8bf345 | 7933 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7934 | { |
7935 | if (thread) { | |
36a4e1fe | 7936 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7937 | set_bit(THREAD_WAKEUP, &thread->flags); |
7938 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7939 | } |
7940 | } | |
6c144d31 | 7941 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7942 | |
4ed8731d SL |
7943 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7944 | struct mddev *mddev, const char *name) | |
1da177e4 | 7945 | { |
2b8bf345 | 7946 | struct md_thread *thread; |
1da177e4 | 7947 | |
2b8bf345 | 7948 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7949 | if (!thread) |
7950 | return NULL; | |
7951 | ||
1da177e4 LT |
7952 | init_waitqueue_head(&thread->wqueue); |
7953 | ||
1da177e4 LT |
7954 | thread->run = run; |
7955 | thread->mddev = mddev; | |
32a7627c | 7956 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7957 | thread->tsk = kthread_run(md_thread, thread, |
7958 | "%s_%s", | |
7959 | mdname(thread->mddev), | |
0232605d | 7960 | name); |
a6fb0934 | 7961 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7962 | kfree(thread); |
7963 | return NULL; | |
7964 | } | |
1da177e4 LT |
7965 | return thread; |
7966 | } | |
6c144d31 | 7967 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7968 | |
2b8bf345 | 7969 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7970 | { |
2b8bf345 | 7971 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7972 | if (!thread) |
7973 | return; | |
36a4e1fe | 7974 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7975 | /* Locking ensures that mddev_unlock does not wake_up a |
7976 | * non-existent thread | |
7977 | */ | |
7978 | spin_lock(&pers_lock); | |
7979 | *threadp = NULL; | |
7980 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7981 | |
7982 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7983 | kfree(thread); |
7984 | } | |
6c144d31 | 7985 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7986 | |
fd01b88c | 7987 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7988 | { |
b2d444d7 | 7989 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7990 | return; |
6bfe0b49 | 7991 | |
de393cde | 7992 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7993 | return; |
7994 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7995 | if (mddev->degraded) |
7996 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7997 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7998 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7999 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8000 | md_wakeup_thread(mddev->thread); | |
768a418d | 8001 | if (mddev->event_work.func) |
e804ac78 | 8002 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 8003 | md_new_event(mddev); |
1da177e4 | 8004 | } |
6c144d31 | 8005 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
8006 | |
8007 | /* seq_file implementation /proc/mdstat */ | |
8008 | ||
8009 | static void status_unused(struct seq_file *seq) | |
8010 | { | |
8011 | int i = 0; | |
3cb03002 | 8012 | struct md_rdev *rdev; |
1da177e4 LT |
8013 | |
8014 | seq_printf(seq, "unused devices: "); | |
8015 | ||
159ec1fc | 8016 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
8017 | char b[BDEVNAME_SIZE]; |
8018 | i++; | |
8019 | seq_printf(seq, "%s ", | |
8020 | bdevname(rdev->bdev,b)); | |
8021 | } | |
8022 | if (!i) | |
8023 | seq_printf(seq, "<none>"); | |
8024 | ||
8025 | seq_printf(seq, "\n"); | |
8026 | } | |
8027 | ||
f7851be7 | 8028 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 8029 | { |
dd71cf6b | 8030 | sector_t max_sectors, resync, res; |
9642fa73 MT |
8031 | unsigned long dt, db = 0; |
8032 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
8033 | int scale, recovery_active; | |
4588b42e | 8034 | unsigned int per_milli; |
1da177e4 | 8035 | |
c804cdec N |
8036 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8037 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 8038 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 8039 | else |
dd71cf6b | 8040 | max_sectors = mddev->dev_sectors; |
1da177e4 | 8041 | |
f7851be7 N |
8042 | resync = mddev->curr_resync; |
8043 | if (resync <= 3) { | |
8044 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
8045 | /* Still cleaning up */ | |
8046 | resync = max_sectors; | |
d2e2ec82 ND |
8047 | } else if (resync > max_sectors) |
8048 | resync = max_sectors; | |
8049 | else | |
f7851be7 N |
8050 | resync -= atomic_read(&mddev->recovery_active); |
8051 | ||
8052 | if (resync == 0) { | |
0357ba27 GJ |
8053 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
8054 | struct md_rdev *rdev; | |
8055 | ||
8056 | rdev_for_each(rdev, mddev) | |
8057 | if (rdev->raid_disk >= 0 && | |
8058 | !test_bit(Faulty, &rdev->flags) && | |
8059 | rdev->recovery_offset != MaxSector && | |
8060 | rdev->recovery_offset) { | |
8061 | seq_printf(seq, "\trecover=REMOTE"); | |
8062 | return 1; | |
8063 | } | |
8064 | if (mddev->reshape_position != MaxSector) | |
8065 | seq_printf(seq, "\treshape=REMOTE"); | |
8066 | else | |
8067 | seq_printf(seq, "\tresync=REMOTE"); | |
8068 | return 1; | |
8069 | } | |
f7851be7 N |
8070 | if (mddev->recovery_cp < MaxSector) { |
8071 | seq_printf(seq, "\tresync=PENDING"); | |
8072 | return 1; | |
8073 | } | |
8074 | return 0; | |
8075 | } | |
8076 | if (resync < 3) { | |
8077 | seq_printf(seq, "\tresync=DELAYED"); | |
8078 | return 1; | |
8079 | } | |
8080 | ||
403df478 | 8081 | WARN_ON(max_sectors == 0); |
4588b42e | 8082 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 8083 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
8084 | * u32, as those are the requirements for sector_div. |
8085 | * Thus 'scale' must be at least 10 | |
8086 | */ | |
8087 | scale = 10; | |
8088 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 8089 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
8090 | scale++; |
8091 | } | |
8092 | res = (resync>>scale)*1000; | |
dd71cf6b | 8093 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
8094 | |
8095 | per_milli = res; | |
1da177e4 | 8096 | { |
4588b42e | 8097 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
8098 | seq_printf(seq, "["); |
8099 | for (i = 0; i < x; i++) | |
8100 | seq_printf(seq, "="); | |
8101 | seq_printf(seq, ">"); | |
8102 | for (i = 0; i < y; i++) | |
8103 | seq_printf(seq, "."); | |
8104 | seq_printf(seq, "] "); | |
8105 | } | |
4588b42e | 8106 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
8107 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
8108 | "reshape" : | |
61df9d91 N |
8109 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
8110 | "check" : | |
8111 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
8112 | "resync" : "recovery"))), | |
8113 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
8114 | (unsigned long long) resync/2, |
8115 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
8116 | |
8117 | /* | |
1da177e4 LT |
8118 | * dt: time from mark until now |
8119 | * db: blocks written from mark until now | |
8120 | * rt: remaining time | |
dd71cf6b | 8121 | * |
9642fa73 MT |
8122 | * rt is a sector_t, which is always 64bit now. We are keeping |
8123 | * the original algorithm, but it is not really necessary. | |
8124 | * | |
8125 | * Original algorithm: | |
8126 | * So we divide before multiply in case it is 32bit and close | |
8127 | * to the limit. | |
8128 | * We scale the divisor (db) by 32 to avoid losing precision | |
8129 | * near the end of resync when the number of remaining sectors | |
8130 | * is close to 'db'. | |
8131 | * We then divide rt by 32 after multiplying by db to compensate. | |
8132 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
8133 | */ |
8134 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
8135 | if (!dt) dt++; | |
9642fa73 MT |
8136 | |
8137 | curr_mark_cnt = mddev->curr_mark_cnt; | |
8138 | recovery_active = atomic_read(&mddev->recovery_active); | |
8139 | resync_mark_cnt = mddev->resync_mark_cnt; | |
8140 | ||
8141 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
8142 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 8143 | |
dd71cf6b | 8144 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 8145 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
8146 | rt *= dt; |
8147 | rt >>= 5; | |
8148 | ||
8149 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
8150 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 8151 | |
ff4e8d9a | 8152 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 8153 | return 1; |
1da177e4 LT |
8154 | } |
8155 | ||
8156 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
8157 | { | |
8158 | struct list_head *tmp; | |
8159 | loff_t l = *pos; | |
fd01b88c | 8160 | struct mddev *mddev; |
1da177e4 LT |
8161 | |
8162 | if (l >= 0x10000) | |
8163 | return NULL; | |
8164 | if (!l--) | |
8165 | /* header */ | |
8166 | return (void*)1; | |
8167 | ||
8168 | spin_lock(&all_mddevs_lock); | |
8169 | list_for_each(tmp,&all_mddevs) | |
8170 | if (!l--) { | |
fd01b88c | 8171 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
8172 | mddev_get(mddev); |
8173 | spin_unlock(&all_mddevs_lock); | |
8174 | return mddev; | |
8175 | } | |
8176 | spin_unlock(&all_mddevs_lock); | |
8177 | if (!l--) | |
8178 | return (void*)2;/* tail */ | |
8179 | return NULL; | |
8180 | } | |
8181 | ||
8182 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
8183 | { | |
8184 | struct list_head *tmp; | |
fd01b88c | 8185 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 8186 | |
1da177e4 LT |
8187 | ++*pos; |
8188 | if (v == (void*)2) | |
8189 | return NULL; | |
8190 | ||
8191 | spin_lock(&all_mddevs_lock); | |
8192 | if (v == (void*)1) | |
8193 | tmp = all_mddevs.next; | |
8194 | else | |
8195 | tmp = mddev->all_mddevs.next; | |
8196 | if (tmp != &all_mddevs) | |
fd01b88c | 8197 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
8198 | else { |
8199 | next_mddev = (void*)2; | |
8200 | *pos = 0x10000; | |
f72ffdd6 | 8201 | } |
1da177e4 LT |
8202 | spin_unlock(&all_mddevs_lock); |
8203 | ||
8204 | if (v != (void*)1) | |
8205 | mddev_put(mddev); | |
8206 | return next_mddev; | |
8207 | ||
8208 | } | |
8209 | ||
8210 | static void md_seq_stop(struct seq_file *seq, void *v) | |
8211 | { | |
fd01b88c | 8212 | struct mddev *mddev = v; |
1da177e4 LT |
8213 | |
8214 | if (mddev && v != (void*)1 && v != (void*)2) | |
8215 | mddev_put(mddev); | |
8216 | } | |
8217 | ||
8218 | static int md_seq_show(struct seq_file *seq, void *v) | |
8219 | { | |
fd01b88c | 8220 | struct mddev *mddev = v; |
dd8ac336 | 8221 | sector_t sectors; |
3cb03002 | 8222 | struct md_rdev *rdev; |
1da177e4 LT |
8223 | |
8224 | if (v == (void*)1) { | |
84fc4b56 | 8225 | struct md_personality *pers; |
1da177e4 LT |
8226 | seq_printf(seq, "Personalities : "); |
8227 | spin_lock(&pers_lock); | |
2604b703 N |
8228 | list_for_each_entry(pers, &pers_list, list) |
8229 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8230 | |
8231 | spin_unlock(&pers_lock); | |
8232 | seq_printf(seq, "\n"); | |
f1514638 | 8233 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8234 | return 0; |
8235 | } | |
8236 | if (v == (void*)2) { | |
8237 | status_unused(seq); | |
8238 | return 0; | |
8239 | } | |
8240 | ||
36d091f4 | 8241 | spin_lock(&mddev->lock); |
1da177e4 LT |
8242 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8243 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8244 | mddev->pers ? "" : "in"); | |
8245 | if (mddev->pers) { | |
f91de92e | 8246 | if (mddev->ro==1) |
1da177e4 | 8247 | seq_printf(seq, " (read-only)"); |
f91de92e | 8248 | if (mddev->ro==2) |
52720ae7 | 8249 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8250 | seq_printf(seq, " %s", mddev->pers->name); |
8251 | } | |
8252 | ||
dd8ac336 | 8253 | sectors = 0; |
f97fcad3 N |
8254 | rcu_read_lock(); |
8255 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8256 | char b[BDEVNAME_SIZE]; |
8257 | seq_printf(seq, " %s[%d]", | |
8258 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8259 | if (test_bit(WriteMostly, &rdev->flags)) |
8260 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8261 | if (test_bit(Journal, &rdev->flags)) |
8262 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8263 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8264 | seq_printf(seq, "(F)"); |
8265 | continue; | |
2d78f8c4 N |
8266 | } |
8267 | if (rdev->raid_disk < 0) | |
b325a32e | 8268 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8269 | if (test_bit(Replacement, &rdev->flags)) |
8270 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8271 | sectors += rdev->sectors; |
1da177e4 | 8272 | } |
f97fcad3 | 8273 | rcu_read_unlock(); |
1da177e4 LT |
8274 | |
8275 | if (!list_empty(&mddev->disks)) { | |
8276 | if (mddev->pers) | |
8277 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8278 | (unsigned long long) |
8279 | mddev->array_sectors / 2); | |
1da177e4 LT |
8280 | else |
8281 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8282 | (unsigned long long)sectors / 2); |
1da177e4 | 8283 | } |
1cd6bf19 N |
8284 | if (mddev->persistent) { |
8285 | if (mddev->major_version != 0 || | |
8286 | mddev->minor_version != 90) { | |
8287 | seq_printf(seq," super %d.%d", | |
8288 | mddev->major_version, | |
8289 | mddev->minor_version); | |
8290 | } | |
e691063a N |
8291 | } else if (mddev->external) |
8292 | seq_printf(seq, " super external:%s", | |
8293 | mddev->metadata_type); | |
8294 | else | |
1cd6bf19 | 8295 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8296 | |
8297 | if (mddev->pers) { | |
d710e138 | 8298 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8299 | seq_printf(seq, "\n "); |
8e1b39d6 | 8300 | if (mddev->pers->sync_request) { |
f7851be7 | 8301 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8302 | seq_printf(seq, "\n "); |
8e1b39d6 | 8303 | } |
32a7627c N |
8304 | } else |
8305 | seq_printf(seq, "\n "); | |
8306 | ||
e64e4018 | 8307 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8308 | |
8309 | seq_printf(seq, "\n"); | |
8310 | } | |
36d091f4 | 8311 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8312 | |
1da177e4 LT |
8313 | return 0; |
8314 | } | |
8315 | ||
110518bc | 8316 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8317 | .start = md_seq_start, |
8318 | .next = md_seq_next, | |
8319 | .stop = md_seq_stop, | |
8320 | .show = md_seq_show, | |
8321 | }; | |
8322 | ||
8323 | static int md_seq_open(struct inode *inode, struct file *file) | |
8324 | { | |
f1514638 | 8325 | struct seq_file *seq; |
1da177e4 LT |
8326 | int error; |
8327 | ||
8328 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8329 | if (error) |
f1514638 KS |
8330 | return error; |
8331 | ||
8332 | seq = file->private_data; | |
8333 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8334 | return error; |
8335 | } | |
8336 | ||
e2f23b60 | 8337 | static int md_unloading; |
afc9a42b | 8338 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8339 | { |
f1514638 | 8340 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8341 | __poll_t mask; |
d7603b7e | 8342 | |
e2f23b60 | 8343 | if (md_unloading) |
a9a08845 | 8344 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8345 | poll_wait(filp, &md_event_waiters, wait); |
8346 | ||
8347 | /* always allow read */ | |
a9a08845 | 8348 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8349 | |
f1514638 | 8350 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8351 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8352 | return mask; |
8353 | } | |
8354 | ||
97a32539 AD |
8355 | static const struct proc_ops mdstat_proc_ops = { |
8356 | .proc_open = md_seq_open, | |
8357 | .proc_read = seq_read, | |
8358 | .proc_lseek = seq_lseek, | |
8359 | .proc_release = seq_release, | |
8360 | .proc_poll = mdstat_poll, | |
1da177e4 LT |
8361 | }; |
8362 | ||
84fc4b56 | 8363 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8364 | { |
9d48739e N |
8365 | pr_debug("md: %s personality registered for level %d\n", |
8366 | p->name, p->level); | |
1da177e4 | 8367 | spin_lock(&pers_lock); |
2604b703 | 8368 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8369 | spin_unlock(&pers_lock); |
8370 | return 0; | |
8371 | } | |
6c144d31 | 8372 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8373 | |
84fc4b56 | 8374 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8375 | { |
9d48739e | 8376 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8377 | spin_lock(&pers_lock); |
2604b703 | 8378 | list_del_init(&p->list); |
1da177e4 LT |
8379 | spin_unlock(&pers_lock); |
8380 | return 0; | |
8381 | } | |
6c144d31 | 8382 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8383 | |
6022e75b N |
8384 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8385 | struct module *module) | |
edb39c9d | 8386 | { |
6022e75b | 8387 | int ret = 0; |
edb39c9d | 8388 | spin_lock(&pers_lock); |
6022e75b N |
8389 | if (md_cluster_ops != NULL) |
8390 | ret = -EALREADY; | |
8391 | else { | |
8392 | md_cluster_ops = ops; | |
8393 | md_cluster_mod = module; | |
8394 | } | |
edb39c9d | 8395 | spin_unlock(&pers_lock); |
6022e75b | 8396 | return ret; |
edb39c9d GR |
8397 | } |
8398 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8399 | ||
8400 | int unregister_md_cluster_operations(void) | |
8401 | { | |
8402 | spin_lock(&pers_lock); | |
8403 | md_cluster_ops = NULL; | |
8404 | spin_unlock(&pers_lock); | |
8405 | return 0; | |
8406 | } | |
8407 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8408 | ||
8409 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8410 | { | |
47a7b0d8 GJ |
8411 | if (!md_cluster_ops) |
8412 | request_module("md-cluster"); | |
edb39c9d | 8413 | spin_lock(&pers_lock); |
47a7b0d8 | 8414 | /* ensure module won't be unloaded */ |
edb39c9d | 8415 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8416 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8417 | spin_unlock(&pers_lock); |
8418 | return -ENOENT; | |
8419 | } | |
8420 | spin_unlock(&pers_lock); | |
8421 | ||
cf921cc1 | 8422 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
8423 | } |
8424 | ||
8425 | void md_cluster_stop(struct mddev *mddev) | |
8426 | { | |
c4ce867f GR |
8427 | if (!md_cluster_ops) |
8428 | return; | |
edb39c9d GR |
8429 | md_cluster_ops->leave(mddev); |
8430 | module_put(md_cluster_mod); | |
8431 | } | |
8432 | ||
fd01b88c | 8433 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8434 | { |
f72ffdd6 | 8435 | struct md_rdev *rdev; |
1da177e4 | 8436 | int idle; |
eea1bf38 | 8437 | int curr_events; |
1da177e4 LT |
8438 | |
8439 | idle = 1; | |
4b80991c N |
8440 | rcu_read_lock(); |
8441 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8442 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
59767fbd | 8443 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8444 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8445 | /* sync IO will cause sync_io to increase before the disk_stats |
8446 | * as sync_io is counted when a request starts, and | |
8447 | * disk_stats is counted when it completes. | |
8448 | * So resync activity will cause curr_events to be smaller than | |
8449 | * when there was no such activity. | |
8450 | * non-sync IO will cause disk_stat to increase without | |
8451 | * increasing sync_io so curr_events will (eventually) | |
8452 | * be larger than it was before. Once it becomes | |
8453 | * substantially larger, the test below will cause | |
8454 | * the array to appear non-idle, and resync will slow | |
8455 | * down. | |
8456 | * If there is a lot of outstanding resync activity when | |
8457 | * we set last_event to curr_events, then all that activity | |
8458 | * completing might cause the array to appear non-idle | |
8459 | * and resync will be slowed down even though there might | |
8460 | * not have been non-resync activity. This will only | |
8461 | * happen once though. 'last_events' will soon reflect | |
8462 | * the state where there is little or no outstanding | |
8463 | * resync requests, and further resync activity will | |
8464 | * always make curr_events less than last_events. | |
c0e48521 | 8465 | * |
1da177e4 | 8466 | */ |
eea1bf38 | 8467 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8468 | rdev->last_events = curr_events; |
8469 | idle = 0; | |
8470 | } | |
8471 | } | |
4b80991c | 8472 | rcu_read_unlock(); |
1da177e4 LT |
8473 | return idle; |
8474 | } | |
8475 | ||
fd01b88c | 8476 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8477 | { |
8478 | /* another "blocks" (512byte) blocks have been synced */ | |
8479 | atomic_sub(blocks, &mddev->recovery_active); | |
8480 | wake_up(&mddev->recovery_wait); | |
8481 | if (!ok) { | |
dfc70645 | 8482 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8483 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8484 | md_wakeup_thread(mddev->thread); |
8485 | // stop recovery, signal do_sync .... | |
8486 | } | |
8487 | } | |
6c144d31 | 8488 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8489 | |
06d91a5f N |
8490 | /* md_write_start(mddev, bi) |
8491 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8492 | * in superblock) before writing, schedule a superblock update |
8493 | * and wait for it to complete. | |
cc27b0c7 N |
8494 | * A return value of 'false' means that the write wasn't recorded |
8495 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8496 | */ |
cc27b0c7 | 8497 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8498 | { |
0fd62b86 | 8499 | int did_change = 0; |
4b6c1060 | 8500 | |
06d91a5f | 8501 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8502 | return true; |
06d91a5f | 8503 | |
f91de92e N |
8504 | BUG_ON(mddev->ro == 1); |
8505 | if (mddev->ro == 2) { | |
8506 | /* need to switch to read/write */ | |
8507 | mddev->ro = 0; | |
8508 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8509 | md_wakeup_thread(mddev->thread); | |
25156198 | 8510 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8511 | did_change = 1; |
f91de92e | 8512 | } |
4ad23a97 N |
8513 | rcu_read_lock(); |
8514 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8515 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8516 | if (mddev->safemode == 1) |
8517 | mddev->safemode = 0; | |
4ad23a97 | 8518 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8519 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8520 | spin_lock(&mddev->lock); |
3d310eb7 N |
8521 | if (mddev->in_sync) { |
8522 | mddev->in_sync = 0; | |
2953079c SL |
8523 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8524 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8525 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8526 | did_change = 1; |
3d310eb7 | 8527 | } |
85572d7c | 8528 | spin_unlock(&mddev->lock); |
06d91a5f | 8529 | } |
4ad23a97 | 8530 | rcu_read_unlock(); |
0fd62b86 | 8531 | if (did_change) |
00bcb4ac | 8532 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8533 | if (!mddev->has_superblocks) |
8534 | return true; | |
09a44cc1 | 8535 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8536 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8537 | mddev->suspended); | |
cc27b0c7 N |
8538 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8539 | percpu_ref_put(&mddev->writes_pending); | |
8540 | return false; | |
8541 | } | |
8542 | return true; | |
1da177e4 | 8543 | } |
6c144d31 | 8544 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8545 | |
49728050 N |
8546 | /* md_write_inc can only be called when md_write_start() has |
8547 | * already been called at least once of the current request. | |
8548 | * It increments the counter and is useful when a single request | |
8549 | * is split into several parts. Each part causes an increment and | |
8550 | * so needs a matching md_write_end(). | |
8551 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8552 | * a spinlocked region. | |
8553 | */ | |
8554 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8555 | { | |
8556 | if (bio_data_dir(bi) != WRITE) | |
8557 | return; | |
8558 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8559 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8560 | } |
8561 | EXPORT_SYMBOL(md_write_inc); | |
8562 | ||
fd01b88c | 8563 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8564 | { |
4ad23a97 N |
8565 | percpu_ref_put(&mddev->writes_pending); |
8566 | ||
8567 | if (mddev->safemode == 2) | |
8568 | md_wakeup_thread(mddev->thread); | |
8569 | else if (mddev->safemode_delay) | |
8570 | /* The roundup() ensures this only performs locking once | |
8571 | * every ->safemode_delay jiffies | |
8572 | */ | |
8573 | mod_timer(&mddev->safemode_timer, | |
8574 | roundup(jiffies, mddev->safemode_delay) + | |
8575 | mddev->safemode_delay); | |
1da177e4 | 8576 | } |
4ad23a97 | 8577 | |
6c144d31 | 8578 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8579 | |
2a2275d6 N |
8580 | /* md_allow_write(mddev) |
8581 | * Calling this ensures that the array is marked 'active' so that writes | |
8582 | * may proceed without blocking. It is important to call this before | |
8583 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8584 | * Must be called with mddev_lock held. | |
8585 | */ | |
2214c260 | 8586 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8587 | { |
8588 | if (!mddev->pers) | |
2214c260 | 8589 | return; |
2a2275d6 | 8590 | if (mddev->ro) |
2214c260 | 8591 | return; |
1a0fd497 | 8592 | if (!mddev->pers->sync_request) |
2214c260 | 8593 | return; |
2a2275d6 | 8594 | |
85572d7c | 8595 | spin_lock(&mddev->lock); |
2a2275d6 N |
8596 | if (mddev->in_sync) { |
8597 | mddev->in_sync = 0; | |
2953079c SL |
8598 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8599 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8600 | if (mddev->safemode_delay && |
8601 | mddev->safemode == 0) | |
8602 | mddev->safemode = 1; | |
85572d7c | 8603 | spin_unlock(&mddev->lock); |
2a2275d6 | 8604 | md_update_sb(mddev, 0); |
00bcb4ac | 8605 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8606 | /* wait for the dirty state to be recorded in the metadata */ |
8607 | wait_event(mddev->sb_wait, | |
2214c260 | 8608 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8609 | } else |
85572d7c | 8610 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8611 | } |
8612 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8613 | ||
1da177e4 LT |
8614 | #define SYNC_MARKS 10 |
8615 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8616 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8617 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8618 | { |
4ed8731d | 8619 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8620 | struct mddev *mddev2; |
e5b521ee | 8621 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8622 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8623 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8624 | unsigned long update_time; |
1da177e4 LT |
8625 | sector_t mark_cnt[SYNC_MARKS]; |
8626 | int last_mark,m; | |
8627 | struct list_head *tmp; | |
8628 | sector_t last_check; | |
57afd89f | 8629 | int skipped = 0; |
3cb03002 | 8630 | struct md_rdev *rdev; |
c4a39551 | 8631 | char *desc, *action = NULL; |
7c2c57c9 | 8632 | struct blk_plug plug; |
41a9a0dc | 8633 | int ret; |
1da177e4 LT |
8634 | |
8635 | /* just incase thread restarts... */ | |
d5d885fd SL |
8636 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8637 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8638 | return; |
3991b31e N |
8639 | if (mddev->ro) {/* never try to sync a read-only array */ |
8640 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8641 | return; |
3991b31e | 8642 | } |
1da177e4 | 8643 | |
41a9a0dc GJ |
8644 | if (mddev_is_clustered(mddev)) { |
8645 | ret = md_cluster_ops->resync_start(mddev); | |
8646 | if (ret) | |
8647 | goto skip; | |
8648 | ||
bb8bf15b | 8649 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8650 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8651 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8652 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8653 | && ((unsigned long long)mddev->curr_resync_completed | |
8654 | < (unsigned long long)mddev->resync_max_sectors)) | |
8655 | goto skip; | |
8656 | } | |
8657 | ||
61df9d91 | 8658 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8659 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8660 | desc = "data-check"; |
c4a39551 JB |
8661 | action = "check"; |
8662 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8663 | desc = "requested-resync"; |
c4a39551 JB |
8664 | action = "repair"; |
8665 | } else | |
61df9d91 N |
8666 | desc = "resync"; |
8667 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8668 | desc = "reshape"; | |
8669 | else | |
8670 | desc = "recovery"; | |
8671 | ||
c4a39551 JB |
8672 | mddev->last_sync_action = action ?: desc; |
8673 | ||
1da177e4 LT |
8674 | /* we overload curr_resync somewhat here. |
8675 | * 0 == not engaged in resync at all | |
8676 | * 2 == checking that there is no conflict with another sync | |
8677 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8678 | * commence |
1da177e4 LT |
8679 | * other == active in resync - this many blocks |
8680 | * | |
8681 | * Before starting a resync we must have set curr_resync to | |
8682 | * 2, and then checked that every "conflicting" array has curr_resync | |
8683 | * less than ours. When we find one that is the same or higher | |
8684 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8685 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8686 | * This will mean we have to start checking from the beginning again. | |
8687 | * | |
8688 | */ | |
8689 | ||
8690 | do { | |
c622ca54 | 8691 | int mddev2_minor = -1; |
1da177e4 LT |
8692 | mddev->curr_resync = 2; |
8693 | ||
8694 | try_again: | |
404e4b43 | 8695 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8696 | goto skip; |
29ac4aa3 | 8697 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8698 | if (mddev2 == mddev) |
8699 | continue; | |
90b08710 BS |
8700 | if (!mddev->parallel_resync |
8701 | && mddev2->curr_resync | |
8702 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8703 | DEFINE_WAIT(wq); |
8704 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8705 | /* arbitrarily yield */ | |
8706 | mddev->curr_resync = 1; | |
8707 | wake_up(&resync_wait); | |
8708 | } | |
8709 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8710 | /* no need to wait here, we can wait the next | |
8711 | * time 'round when curr_resync == 2 | |
8712 | */ | |
8713 | continue; | |
9744197c N |
8714 | /* We need to wait 'interruptible' so as not to |
8715 | * contribute to the load average, and not to | |
8716 | * be caught by 'softlockup' | |
8717 | */ | |
8718 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8719 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8720 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8721 | if (mddev2_minor != mddev2->md_minor) { |
8722 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8723 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8724 | desc, mdname(mddev), | |
8725 | mdname(mddev2)); | |
c622ca54 | 8726 | } |
1da177e4 | 8727 | mddev_put(mddev2); |
9744197c N |
8728 | if (signal_pending(current)) |
8729 | flush_signals(current); | |
1da177e4 LT |
8730 | schedule(); |
8731 | finish_wait(&resync_wait, &wq); | |
8732 | goto try_again; | |
8733 | } | |
8734 | finish_wait(&resync_wait, &wq); | |
8735 | } | |
8736 | } | |
8737 | } while (mddev->curr_resync < 2); | |
8738 | ||
5fd6c1dc | 8739 | j = 0; |
9d88883e | 8740 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8741 | /* resync follows the size requested by the personality, |
57afd89f | 8742 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8743 | */ |
8744 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8745 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8746 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8747 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8748 | j = mddev->resync_min; | |
8749 | else if (!mddev->bitmap) | |
5fd6c1dc | 8750 | j = mddev->recovery_cp; |
5e96ee65 | 8751 | |
cb9ee154 | 8752 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8753 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8754 | /* |
8755 | * If the original node aborts reshaping then we continue the | |
8756 | * reshaping, so set j again to avoid restart reshape from the | |
8757 | * first beginning | |
8758 | */ | |
8759 | if (mddev_is_clustered(mddev) && | |
8760 | mddev->reshape_position != MaxSector) | |
8761 | j = mddev->reshape_position; | |
8762 | } else { | |
1da177e4 | 8763 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8764 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8765 | j = MaxSector; |
4e59ca7d | 8766 | rcu_read_lock(); |
dafb20fa | 8767 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8768 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8769 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8770 | !test_bit(Faulty, &rdev->flags) && |
8771 | !test_bit(In_sync, &rdev->flags) && | |
8772 | rdev->recovery_offset < j) | |
8773 | j = rdev->recovery_offset; | |
4e59ca7d | 8774 | rcu_read_unlock(); |
133d4527 N |
8775 | |
8776 | /* If there is a bitmap, we need to make sure all | |
8777 | * writes that started before we added a spare | |
8778 | * complete before we start doing a recovery. | |
8779 | * Otherwise the write might complete and (via | |
8780 | * bitmap_endwrite) set a bit in the bitmap after the | |
8781 | * recovery has checked that bit and skipped that | |
8782 | * region. | |
8783 | */ | |
8784 | if (mddev->bitmap) { | |
8785 | mddev->pers->quiesce(mddev, 1); | |
8786 | mddev->pers->quiesce(mddev, 0); | |
8787 | } | |
5fd6c1dc | 8788 | } |
1da177e4 | 8789 | |
9d48739e N |
8790 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8791 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8792 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8793 | speed_max(mddev), desc); | |
1da177e4 | 8794 | |
eea1bf38 | 8795 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8796 | |
57afd89f | 8797 | io_sectors = 0; |
1da177e4 LT |
8798 | for (m = 0; m < SYNC_MARKS; m++) { |
8799 | mark[m] = jiffies; | |
57afd89f | 8800 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8801 | } |
8802 | last_mark = 0; | |
8803 | mddev->resync_mark = mark[last_mark]; | |
8804 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8805 | ||
8806 | /* | |
8807 | * Tune reconstruction: | |
8808 | */ | |
e5b521ee | 8809 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8810 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8811 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8812 | |
8813 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8814 | last_check = 0; |
8815 | ||
8816 | if (j>2) { | |
9d48739e N |
8817 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8818 | desc, mdname(mddev)); | |
1da177e4 | 8819 | mddev->curr_resync = j; |
72f36d59 N |
8820 | } else |
8821 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8822 | mddev->curr_resync_completed = j; |
e1a86dbb | 8823 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
72f36d59 | 8824 | md_new_event(mddev); |
54f89341 | 8825 | update_time = jiffies; |
1da177e4 | 8826 | |
7c2c57c9 | 8827 | blk_start_plug(&plug); |
1da177e4 | 8828 | while (j < max_sectors) { |
57afd89f | 8829 | sector_t sectors; |
1da177e4 | 8830 | |
57afd89f | 8831 | skipped = 0; |
97e4f42d | 8832 | |
7a91ee1f N |
8833 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8834 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8835 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8836 | > (max_sectors >> 4)) || | |
54f89341 | 8837 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8838 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8839 | >= mddev->resync_max - mddev->curr_resync_completed || |
8840 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8841 | )) { |
97e4f42d | 8842 | /* time to update curr_resync_completed */ |
97e4f42d N |
8843 | wait_event(mddev->recovery_wait, |
8844 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8845 | mddev->curr_resync_completed = j; |
35d78c66 | 8846 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8847 | j > mddev->recovery_cp) | |
8848 | mddev->recovery_cp = j; | |
54f89341 | 8849 | update_time = jiffies; |
2953079c | 8850 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
e1a86dbb | 8851 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
97e4f42d | 8852 | } |
acb180b0 | 8853 | |
c91abf5a N |
8854 | while (j >= mddev->resync_max && |
8855 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8856 | /* As this condition is controlled by user-space, |
8857 | * we can block indefinitely, so use '_interruptible' | |
8858 | * to avoid triggering warnings. | |
8859 | */ | |
8860 | flush_signals(current); /* just in case */ | |
8861 | wait_event_interruptible(mddev->recovery_wait, | |
8862 | mddev->resync_max > j | |
c91abf5a N |
8863 | || test_bit(MD_RECOVERY_INTR, |
8864 | &mddev->recovery)); | |
e62e58a5 | 8865 | } |
acb180b0 | 8866 | |
c91abf5a N |
8867 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8868 | break; | |
acb180b0 | 8869 | |
09314799 | 8870 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8871 | if (sectors == 0) { |
dfc70645 | 8872 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8873 | break; |
1da177e4 | 8874 | } |
57afd89f N |
8875 | |
8876 | if (!skipped) { /* actual IO requested */ | |
8877 | io_sectors += sectors; | |
8878 | atomic_add(sectors, &mddev->recovery_active); | |
8879 | } | |
8880 | ||
e875ecea N |
8881 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8882 | break; | |
8883 | ||
1da177e4 | 8884 | j += sectors; |
5ed1df2e N |
8885 | if (j > max_sectors) |
8886 | /* when skipping, extra large numbers can be returned. */ | |
8887 | j = max_sectors; | |
72f36d59 N |
8888 | if (j > 2) |
8889 | mddev->curr_resync = j; | |
ff4e8d9a | 8890 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8891 | if (last_check == 0) |
e875ecea | 8892 | /* this is the earliest that rebuild will be |
d7603b7e N |
8893 | * visible in /proc/mdstat |
8894 | */ | |
8895 | md_new_event(mddev); | |
57afd89f N |
8896 | |
8897 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8898 | continue; |
8899 | ||
57afd89f | 8900 | last_check = io_sectors; |
1da177e4 LT |
8901 | repeat: |
8902 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8903 | /* step marks */ | |
8904 | int next = (last_mark+1) % SYNC_MARKS; | |
8905 | ||
8906 | mddev->resync_mark = mark[next]; | |
8907 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8908 | mark[next] = jiffies; | |
57afd89f | 8909 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8910 | last_mark = next; |
8911 | } | |
8912 | ||
c91abf5a N |
8913 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8914 | break; | |
1da177e4 LT |
8915 | |
8916 | /* | |
8917 | * this loop exits only if either when we are slower than | |
8918 | * the 'hard' speed limit, or the system was IO-idle for | |
8919 | * a jiffy. | |
8920 | * the system might be non-idle CPU-wise, but we only care | |
8921 | * about not overloading the IO subsystem. (things like an | |
8922 | * e2fsck being done on the RAID array should execute fast) | |
8923 | */ | |
1da177e4 LT |
8924 | cond_resched(); |
8925 | ||
ac7e50a3 XN |
8926 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8927 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8928 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8929 | |
88202a0c | 8930 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8931 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8932 | msleep(500); |
1da177e4 LT |
8933 | goto repeat; |
8934 | } | |
ac8fa419 N |
8935 | if (!is_mddev_idle(mddev, 0)) { |
8936 | /* | |
8937 | * Give other IO more of a chance. | |
8938 | * The faster the devices, the less we wait. | |
8939 | */ | |
8940 | wait_event(mddev->recovery_wait, | |
8941 | !atomic_read(&mddev->recovery_active)); | |
8942 | } | |
1da177e4 LT |
8943 | } |
8944 | } | |
9d48739e N |
8945 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8946 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8947 | ? "interrupted" : "done"); | |
1da177e4 LT |
8948 | /* |
8949 | * this also signals 'finished resyncing' to md_stop | |
8950 | */ | |
7c2c57c9 | 8951 | blk_finish_plug(&plug); |
1da177e4 LT |
8952 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8953 | ||
5ed1df2e N |
8954 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8955 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8956 | mddev->curr_resync > 3) { |
5ed1df2e | 8957 | mddev->curr_resync_completed = mddev->curr_resync; |
e1a86dbb | 8958 | sysfs_notify_dirent_safe(mddev->sysfs_completed); |
5ed1df2e | 8959 | } |
09314799 | 8960 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8961 | |
dfc70645 | 8962 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8963 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8964 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8965 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8966 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8967 | pr_debug("md: checkpointing %s of %s.\n", |
8968 | desc, mdname(mddev)); | |
0a19caab | 8969 | if (test_bit(MD_RECOVERY_ERROR, |
8970 | &mddev->recovery)) | |
8971 | mddev->recovery_cp = | |
8972 | mddev->curr_resync_completed; | |
8973 | else | |
8974 | mddev->recovery_cp = | |
8975 | mddev->curr_resync; | |
5fd6c1dc N |
8976 | } |
8977 | } else | |
8978 | mddev->recovery_cp = MaxSector; | |
8979 | } else { | |
8980 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8981 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8982 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8983 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8984 | rcu_read_lock(); | |
8985 | rdev_for_each_rcu(rdev, mddev) | |
8986 | if (rdev->raid_disk >= 0 && | |
8987 | mddev->delta_disks >= 0 && | |
8988 | !test_bit(Journal, &rdev->flags) && | |
8989 | !test_bit(Faulty, &rdev->flags) && | |
8990 | !test_bit(In_sync, &rdev->flags) && | |
8991 | rdev->recovery_offset < mddev->curr_resync) | |
8992 | rdev->recovery_offset = mddev->curr_resync; | |
8993 | rcu_read_unlock(); | |
8994 | } | |
5fd6c1dc | 8995 | } |
1da177e4 | 8996 | } |
db91ff55 | 8997 | skip: |
bb8bf15b GJ |
8998 | /* set CHANGE_PENDING here since maybe another update is needed, |
8999 | * so other nodes are informed. It should be harmless for normal | |
9000 | * raid */ | |
2953079c SL |
9001 | set_mask_bits(&mddev->sb_flags, 0, |
9002 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 9003 | |
8876391e BC |
9004 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
9005 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9006 | mddev->delta_disks > 0 && | |
9007 | mddev->pers->finish_reshape && | |
9008 | mddev->pers->size && | |
9009 | mddev->queue) { | |
9010 | mddev_lock_nointr(mddev); | |
9011 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
9012 | mddev_unlock(mddev); | |
aefb2e5f GJ |
9013 | if (!mddev_is_clustered(mddev)) { |
9014 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
9015 | revalidate_disk(mddev->gendisk); | |
9016 | } | |
8876391e BC |
9017 | } |
9018 | ||
23da422b | 9019 | spin_lock(&mddev->lock); |
c07b70ad N |
9020 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
9021 | /* We completed so min/max setting can be forgotten if used. */ | |
9022 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9023 | mddev->resync_min = 0; | |
9024 | mddev->resync_max = MaxSector; | |
9025 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
9026 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 9027 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 9028 | mddev->curr_resync = 0; |
23da422b N |
9029 | spin_unlock(&mddev->lock); |
9030 | ||
1da177e4 | 9031 | wake_up(&resync_wait); |
1da177e4 | 9032 | md_wakeup_thread(mddev->thread); |
c6207277 | 9033 | return; |
1da177e4 | 9034 | } |
29269553 | 9035 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 9036 | |
746d3207 N |
9037 | static int remove_and_add_spares(struct mddev *mddev, |
9038 | struct md_rdev *this) | |
b4c4c7b8 | 9039 | { |
3cb03002 | 9040 | struct md_rdev *rdev; |
b4c4c7b8 | 9041 | int spares = 0; |
f2a371c5 | 9042 | int removed = 0; |
d787be40 | 9043 | bool remove_some = false; |
b4c4c7b8 | 9044 | |
39772f0a N |
9045 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
9046 | /* Mustn't remove devices when resync thread is running */ | |
9047 | return 0; | |
9048 | ||
d787be40 N |
9049 | rdev_for_each(rdev, mddev) { |
9050 | if ((this == NULL || rdev == this) && | |
9051 | rdev->raid_disk >= 0 && | |
9052 | !test_bit(Blocked, &rdev->flags) && | |
9053 | test_bit(Faulty, &rdev->flags) && | |
9054 | atomic_read(&rdev->nr_pending)==0) { | |
9055 | /* Faulty non-Blocked devices with nr_pending == 0 | |
9056 | * never get nr_pending incremented, | |
9057 | * never get Faulty cleared, and never get Blocked set. | |
9058 | * So we can synchronize_rcu now rather than once per device | |
9059 | */ | |
9060 | remove_some = true; | |
9061 | set_bit(RemoveSynchronized, &rdev->flags); | |
9062 | } | |
9063 | } | |
9064 | ||
9065 | if (remove_some) | |
9066 | synchronize_rcu(); | |
9067 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
9068 | if ((this == NULL || rdev == this) && |
9069 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 9070 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 9071 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
9072 | (!test_bit(In_sync, &rdev->flags) && |
9073 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 9074 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 9075 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 9076 | mddev, rdev) == 0) { |
36fad858 | 9077 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 9078 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 9079 | rdev->raid_disk = -1; |
f2a371c5 | 9080 | removed++; |
b4c4c7b8 N |
9081 | } |
9082 | } | |
d787be40 N |
9083 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
9084 | clear_bit(RemoveSynchronized, &rdev->flags); | |
9085 | } | |
9086 | ||
90584fc9 | 9087 | if (removed && mddev->kobj.sd) |
e1a86dbb | 9088 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
b4c4c7b8 | 9089 | |
2910ff17 | 9090 | if (this && removed) |
746d3207 N |
9091 | goto no_add; |
9092 | ||
dafb20fa | 9093 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
9094 | if (this && this != rdev) |
9095 | continue; | |
dbb64f86 GR |
9096 | if (test_bit(Candidate, &rdev->flags)) |
9097 | continue; | |
7bfec5f3 N |
9098 | if (rdev->raid_disk >= 0 && |
9099 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 9100 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
9101 | !test_bit(Faulty, &rdev->flags)) |
9102 | spares++; | |
7ceb17e8 N |
9103 | if (rdev->raid_disk >= 0) |
9104 | continue; | |
9105 | if (test_bit(Faulty, &rdev->flags)) | |
9106 | continue; | |
f6b6ec5c SL |
9107 | if (!test_bit(Journal, &rdev->flags)) { |
9108 | if (mddev->ro && | |
9109 | ! (rdev->saved_raid_disk >= 0 && | |
9110 | !test_bit(Bitmap_sync, &rdev->flags))) | |
9111 | continue; | |
7ceb17e8 | 9112 | |
f6b6ec5c SL |
9113 | rdev->recovery_offset = 0; |
9114 | } | |
3f79cc22 | 9115 | if (mddev->pers->hot_add_disk(mddev, rdev) == 0) { |
5e3b8a8d DLM |
9116 | /* failure here is OK */ |
9117 | sysfs_link_rdev(mddev, rdev); | |
f6b6ec5c SL |
9118 | if (!test_bit(Journal, &rdev->flags)) |
9119 | spares++; | |
7ceb17e8 | 9120 | md_new_event(mddev); |
2953079c | 9121 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 9122 | } |
b4c4c7b8 | 9123 | } |
746d3207 | 9124 | no_add: |
6dafab6b | 9125 | if (removed) |
2953079c | 9126 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
9127 | return spares; |
9128 | } | |
7ebc0be7 | 9129 | |
ac05f256 N |
9130 | static void md_start_sync(struct work_struct *ws) |
9131 | { | |
9132 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 9133 | |
ac05f256 N |
9134 | mddev->sync_thread = md_register_thread(md_do_sync, |
9135 | mddev, | |
9136 | "resync"); | |
9137 | if (!mddev->sync_thread) { | |
9d48739e N |
9138 | pr_warn("%s: could not start resync thread...\n", |
9139 | mdname(mddev)); | |
ac05f256 N |
9140 | /* leave the spares where they are, it shouldn't hurt */ |
9141 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
9142 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9143 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9144 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
9145 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9146 | wake_up(&resync_wait); |
ac05f256 N |
9147 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9148 | &mddev->recovery)) | |
9149 | if (mddev->sysfs_action) | |
9150 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9151 | } else | |
9152 | md_wakeup_thread(mddev->sync_thread); | |
9153 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9154 | md_new_event(mddev); | |
9155 | } | |
9156 | ||
1da177e4 LT |
9157 | /* |
9158 | * This routine is regularly called by all per-raid-array threads to | |
9159 | * deal with generic issues like resync and super-block update. | |
9160 | * Raid personalities that don't have a thread (linear/raid0) do not | |
9161 | * need this as they never do any recovery or update the superblock. | |
9162 | * | |
9163 | * It does not do any resync itself, but rather "forks" off other threads | |
9164 | * to do that as needed. | |
9165 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
9166 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 9167 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
9168 | * and wakeups up this thread which will reap the thread and finish up. |
9169 | * This thread also removes any faulty devices (with nr_pending == 0). | |
9170 | * | |
9171 | * The overall approach is: | |
9172 | * 1/ if the superblock needs updating, update it. | |
9173 | * 2/ If a recovery thread is running, don't do anything else. | |
9174 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
9175 | * 4/ If there are any faulty devices, remove them. | |
9176 | * 5/ If array is degraded, try to add spares devices | |
9177 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
9178 | */ | |
fd01b88c | 9179 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 9180 | { |
059421e0 N |
9181 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
9182 | /* Write superblock - thread that called mddev_suspend() | |
9183 | * holds reconfig_mutex for us. | |
9184 | */ | |
9185 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
9186 | smp_mb__after_atomic(); | |
9187 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
9188 | md_update_sb(mddev, 0); | |
9189 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
9190 | wake_up(&mddev->sb_wait); | |
9191 | } | |
9192 | ||
68866e42 JB |
9193 | if (mddev->suspended) |
9194 | return; | |
9195 | ||
5f40402d | 9196 | if (mddev->bitmap) |
e64e4018 | 9197 | md_bitmap_daemon_work(mddev); |
1da177e4 | 9198 | |
fca4d848 | 9199 | if (signal_pending(current)) { |
31a59e34 | 9200 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
9201 | pr_debug("md: %s in immediate safe mode\n", |
9202 | mdname(mddev)); | |
fca4d848 N |
9203 | mddev->safemode = 2; |
9204 | } | |
9205 | flush_signals(current); | |
9206 | } | |
9207 | ||
c89a8eee N |
9208 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
9209 | return; | |
1da177e4 | 9210 | if ( ! ( |
2953079c | 9211 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 9212 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9213 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9214 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9215 | (mddev->safemode == 2 |
fca4d848 | 9216 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9217 | )) |
9218 | return; | |
fca4d848 | 9219 | |
df5b89b3 | 9220 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9221 | int spares = 0; |
480523fe | 9222 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9223 | |
afc1f55c | 9224 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9225 | mddev->safemode = 0; |
9226 | ||
c89a8eee | 9227 | if (mddev->ro) { |
ab16bfc7 NB |
9228 | struct md_rdev *rdev; |
9229 | if (!mddev->external && mddev->in_sync) | |
9230 | /* 'Blocked' flag not needed as failed devices | |
9231 | * will be recorded if array switched to read/write. | |
9232 | * Leaving it set will prevent the device | |
9233 | * from being removed. | |
9234 | */ | |
9235 | rdev_for_each(rdev, mddev) | |
9236 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9237 | /* On a read-only array we can: |
9238 | * - remove failed devices | |
9239 | * - add already-in_sync devices if the array itself | |
9240 | * is in-sync. | |
9241 | * As we only add devices that are already in-sync, | |
9242 | * we can activate the spares immediately. | |
c89a8eee | 9243 | */ |
7ceb17e8 | 9244 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9245 | /* There is no thread, but we need to call |
9246 | * ->spare_active and clear saved_raid_disk | |
9247 | */ | |
2ac295a5 | 9248 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 9249 | md_reap_sync_thread(mddev); |
a4a3d26d | 9250 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9251 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9252 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9253 | goto unlock; |
9254 | } | |
9255 | ||
659b254f GJ |
9256 | if (mddev_is_clustered(mddev)) { |
9257 | struct md_rdev *rdev; | |
9258 | /* kick the device if another node issued a | |
9259 | * remove disk. | |
9260 | */ | |
9261 | rdev_for_each(rdev, mddev) { | |
9262 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
9263 | rdev->raid_disk < 0) | |
9264 | md_kick_rdev_from_array(rdev); | |
9265 | } | |
9266 | } | |
9267 | ||
480523fe | 9268 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9269 | spin_lock(&mddev->lock); |
6497709b | 9270 | set_in_sync(mddev); |
85572d7c | 9271 | spin_unlock(&mddev->lock); |
fca4d848 | 9272 | } |
fca4d848 | 9273 | |
2953079c | 9274 | if (mddev->sb_flags) |
850b2b42 | 9275 | md_update_sb(mddev, 0); |
06d91a5f | 9276 | |
1da177e4 LT |
9277 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9278 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9279 | /* resync/recovery still happening */ | |
9280 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9281 | goto unlock; | |
9282 | } | |
9283 | if (mddev->sync_thread) { | |
a91d5ac0 | 9284 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9285 | goto unlock; |
9286 | } | |
72a23c21 NB |
9287 | /* Set RUNNING before clearing NEEDED to avoid |
9288 | * any transients in the value of "sync_action". | |
9289 | */ | |
72f36d59 | 9290 | mddev->curr_resync_completed = 0; |
23da422b | 9291 | spin_lock(&mddev->lock); |
72a23c21 | 9292 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9293 | spin_unlock(&mddev->lock); |
24dd469d N |
9294 | /* Clear some bits that don't mean anything, but |
9295 | * might be left set | |
9296 | */ | |
24dd469d N |
9297 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9298 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9299 | |
ed209584 N |
9300 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9301 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9302 | goto not_running; |
1da177e4 LT |
9303 | /* no recovery is running. |
9304 | * remove any failed drives, then | |
9305 | * add spares if possible. | |
72f36d59 | 9306 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9307 | * the personality to fail the re-add. |
9308 | */ | |
1da177e4 | 9309 | |
b4c4c7b8 | 9310 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9311 | if (mddev->pers->check_reshape == NULL || |
9312 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9313 | /* Cannot proceed */ |
ac05f256 | 9314 | goto not_running; |
b4c4c7b8 | 9315 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9316 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9317 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9318 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9319 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9320 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9321 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9322 | } else if (mddev->recovery_cp < MaxSector) { |
9323 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9324 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9325 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9326 | /* nothing to be done ... */ | |
ac05f256 | 9327 | goto not_running; |
24dd469d | 9328 | |
1da177e4 | 9329 | if (mddev->pers->sync_request) { |
ef99bf48 | 9330 | if (spares) { |
a654b9d8 N |
9331 | /* We are adding a device or devices to an array |
9332 | * which has the bitmap stored on all devices. | |
9333 | * So make sure all bitmap pages get written | |
9334 | */ | |
e64e4018 | 9335 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9336 | } |
ac05f256 N |
9337 | INIT_WORK(&mddev->del_work, md_start_sync); |
9338 | queue_work(md_misc_wq, &mddev->del_work); | |
9339 | goto unlock; | |
1da177e4 | 9340 | } |
ac05f256 | 9341 | not_running: |
72a23c21 NB |
9342 | if (!mddev->sync_thread) { |
9343 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9344 | wake_up(&resync_wait); |
72a23c21 NB |
9345 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9346 | &mddev->recovery)) | |
0c3573f1 | 9347 | if (mddev->sysfs_action) |
00bcb4ac | 9348 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9349 | } |
ac05f256 N |
9350 | unlock: |
9351 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9352 | mddev_unlock(mddev); |
9353 | } | |
9354 | } | |
6c144d31 | 9355 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9356 | |
a91d5ac0 JB |
9357 | void md_reap_sync_thread(struct mddev *mddev) |
9358 | { | |
9359 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9360 | sector_t old_dev_sectors = mddev->dev_sectors; |
9361 | bool is_reshaped = false; | |
a91d5ac0 JB |
9362 | |
9363 | /* resync has finished, collect result */ | |
9364 | md_unregister_thread(&mddev->sync_thread); | |
9365 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9366 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9367 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9368 | /* success...*/ |
9369 | /* activate any spares */ | |
9370 | if (mddev->pers->spare_active(mddev)) { | |
e1a86dbb | 9371 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
2953079c | 9372 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9373 | } |
9374 | } | |
9375 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9376 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9377 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9378 | if (mddev_is_clustered(mddev)) |
9379 | is_reshaped = true; | |
9380 | } | |
a91d5ac0 JB |
9381 | |
9382 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9383 | * information must be scrapped. |
a91d5ac0 | 9384 | */ |
f466722c N |
9385 | if (!mddev->degraded) |
9386 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9387 | rdev->saved_raid_disk = -1; |
9388 | ||
9389 | md_update_sb(mddev, 1); | |
2953079c | 9390 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9391 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9392 | * clustered raid */ | |
9393 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9394 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9395 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9396 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9397 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9398 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9399 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9400 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9401 | /* |
9402 | * We call md_cluster_ops->update_size here because sync_size could | |
9403 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9404 | * so it is time to update size across cluster. | |
9405 | */ | |
9406 | if (mddev_is_clustered(mddev) && is_reshaped | |
9407 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9408 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9409 | wake_up(&resync_wait); |
a91d5ac0 JB |
9410 | /* flag recovery needed just to double check */ |
9411 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9412 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9413 | md_new_event(mddev); | |
9414 | if (mddev->event_work.func) | |
9415 | queue_work(md_misc_wq, &mddev->event_work); | |
9416 | } | |
6c144d31 | 9417 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9418 | |
fd01b88c | 9419 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9420 | { |
00bcb4ac | 9421 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9422 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9423 | !test_bit(Blocked, &rdev->flags) && |
9424 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9425 | msecs_to_jiffies(5000)); |
9426 | rdev_dec_pending(rdev, mddev); | |
9427 | } | |
9428 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9429 | ||
c6563a8c N |
9430 | void md_finish_reshape(struct mddev *mddev) |
9431 | { | |
9432 | /* called be personality module when reshape completes. */ | |
9433 | struct md_rdev *rdev; | |
9434 | ||
9435 | rdev_for_each(rdev, mddev) { | |
9436 | if (rdev->data_offset > rdev->new_data_offset) | |
9437 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9438 | else | |
9439 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9440 | rdev->data_offset = rdev->new_data_offset; | |
9441 | } | |
9442 | } | |
9443 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9444 | |
fc974ee2 | 9445 | /* Bad block management */ |
2230dfe4 | 9446 | |
fc974ee2 | 9447 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9448 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9449 | int is_new) |
2230dfe4 | 9450 | { |
85ad1d13 | 9451 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9452 | int rv; |
9453 | if (is_new) | |
9454 | s += rdev->new_data_offset; | |
9455 | else | |
9456 | s += rdev->data_offset; | |
fc974ee2 VV |
9457 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9458 | if (rv == 0) { | |
2230dfe4 | 9459 | /* Make sure they get written out promptly */ |
35b785f7 | 9460 | if (test_bit(ExternalBbl, &rdev->flags)) |
e1a86dbb | 9461 | sysfs_notify_dirent_safe(rdev->sysfs_unack_badblocks); |
8bd2f0a0 | 9462 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9463 | set_mask_bits(&mddev->sb_flags, 0, |
9464 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9465 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9466 | return 1; |
9467 | } else | |
9468 | return 0; | |
2230dfe4 N |
9469 | } |
9470 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9471 | ||
c6563a8c N |
9472 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9473 | int is_new) | |
2230dfe4 | 9474 | { |
35b785f7 | 9475 | int rv; |
c6563a8c N |
9476 | if (is_new) |
9477 | s += rdev->new_data_offset; | |
9478 | else | |
9479 | s += rdev->data_offset; | |
35b785f7 TM |
9480 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9481 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
e1a86dbb | 9482 | sysfs_notify_dirent_safe(rdev->sysfs_badblocks); |
35b785f7 | 9483 | return rv; |
2230dfe4 N |
9484 | } |
9485 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9486 | ||
75c96f85 AB |
9487 | static int md_notify_reboot(struct notifier_block *this, |
9488 | unsigned long code, void *x) | |
1da177e4 LT |
9489 | { |
9490 | struct list_head *tmp; | |
fd01b88c | 9491 | struct mddev *mddev; |
2dba6a91 | 9492 | int need_delay = 0; |
1da177e4 | 9493 | |
c744a65c N |
9494 | for_each_mddev(mddev, tmp) { |
9495 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9496 | if (mddev->pers) |
9497 | __md_stop_writes(mddev); | |
0f62fb22 N |
9498 | if (mddev->persistent) |
9499 | mddev->safemode = 2; | |
c744a65c | 9500 | mddev_unlock(mddev); |
2dba6a91 | 9501 | } |
c744a65c | 9502 | need_delay = 1; |
1da177e4 | 9503 | } |
c744a65c N |
9504 | /* |
9505 | * certain more exotic SCSI devices are known to be | |
9506 | * volatile wrt too early system reboots. While the | |
9507 | * right place to handle this issue is the given | |
9508 | * driver, we do want to have a safe RAID driver ... | |
9509 | */ | |
9510 | if (need_delay) | |
9511 | mdelay(1000*1); | |
9512 | ||
1da177e4 LT |
9513 | return NOTIFY_DONE; |
9514 | } | |
9515 | ||
75c96f85 | 9516 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9517 | .notifier_call = md_notify_reboot, |
9518 | .next = NULL, | |
9519 | .priority = INT_MAX, /* before any real devices */ | |
9520 | }; | |
9521 | ||
9522 | static void md_geninit(void) | |
9523 | { | |
36a4e1fe | 9524 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9525 | |
97a32539 | 9526 | proc_create("mdstat", S_IRUGO, NULL, &mdstat_proc_ops); |
1da177e4 LT |
9527 | } |
9528 | ||
75c96f85 | 9529 | static int __init md_init(void) |
1da177e4 | 9530 | { |
e804ac78 TH |
9531 | int ret = -ENOMEM; |
9532 | ||
ada609ee | 9533 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9534 | if (!md_wq) |
9535 | goto err_wq; | |
9536 | ||
9537 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9538 | if (!md_misc_wq) | |
9539 | goto err_misc_wq; | |
9540 | ||
cc1ffe61 GJ |
9541 | md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0); |
9542 | if (!md_misc_wq) | |
9543 | goto err_rdev_misc_wq; | |
9544 | ||
e804ac78 TH |
9545 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) |
9546 | goto err_md; | |
9547 | ||
9548 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9549 | goto err_mdp; | |
9550 | mdp_major = ret; | |
9551 | ||
af5628f0 | 9552 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9553 | md_probe, NULL, NULL); |
9554 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9555 | md_probe, NULL, NULL); |
9556 | ||
1da177e4 | 9557 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9558 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9559 | |
9560 | md_geninit(); | |
d710e138 | 9561 | return 0; |
1da177e4 | 9562 | |
e804ac78 TH |
9563 | err_mdp: |
9564 | unregister_blkdev(MD_MAJOR, "md"); | |
9565 | err_md: | |
cc1ffe61 GJ |
9566 | destroy_workqueue(md_rdev_misc_wq); |
9567 | err_rdev_misc_wq: | |
e804ac78 TH |
9568 | destroy_workqueue(md_misc_wq); |
9569 | err_misc_wq: | |
9570 | destroy_workqueue(md_wq); | |
9571 | err_wq: | |
9572 | return ret; | |
9573 | } | |
1da177e4 | 9574 | |
70bcecdb | 9575 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9576 | { |
70bcecdb GR |
9577 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9578 | struct md_rdev *rdev2; | |
9579 | int role, ret; | |
9580 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9581 | |
818da59f GJ |
9582 | /* |
9583 | * If size is changed in another node then we need to | |
9584 | * do resize as well. | |
9585 | */ | |
9586 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9587 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9588 | if (ret) | |
9589 | pr_info("md-cluster: resize failed\n"); | |
9590 | else | |
e64e4018 | 9591 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9592 | } |
9593 | ||
70bcecdb GR |
9594 | /* Check for change of roles in the active devices */ |
9595 | rdev_for_each(rdev2, mddev) { | |
9596 | if (test_bit(Faulty, &rdev2->flags)) | |
9597 | continue; | |
9598 | ||
9599 | /* Check if the roles changed */ | |
9600 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9601 | |
9602 | if (test_bit(Candidate, &rdev2->flags)) { | |
9603 | if (role == 0xfffe) { | |
9604 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9605 | md_kick_rdev_from_array(rdev2); | |
9606 | continue; | |
9607 | } | |
9608 | else | |
9609 | clear_bit(Candidate, &rdev2->flags); | |
9610 | } | |
9611 | ||
70bcecdb | 9612 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9613 | /* |
9614 | * got activated except reshape is happening. | |
9615 | */ | |
9616 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9617 | !(le32_to_cpu(sb->feature_map) & | |
9618 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9619 | rdev2->saved_raid_disk = role; |
9620 | ret = remove_and_add_spares(mddev, rdev2); | |
9621 | pr_info("Activated spare: %s\n", | |
9d48739e | 9622 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9623 | /* wakeup mddev->thread here, so array could |
9624 | * perform resync with the new activated disk */ | |
9625 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9626 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9627 | } |
9628 | /* device faulty | |
9629 | * We just want to do the minimum to mark the disk | |
9630 | * as faulty. The recovery is performed by the | |
9631 | * one who initiated the error. | |
9632 | */ | |
9633 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9634 | md_error(mddev, rdev2); | |
9635 | clear_bit(Blocked, &rdev2->flags); | |
9636 | } | |
9637 | } | |
1d7e3e96 | 9638 | } |
70bcecdb | 9639 | |
28c1b9fd GR |
9640 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9641 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9642 | |
7564beda GJ |
9643 | /* |
9644 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9645 | * so it is time to check reshape. | |
9646 | */ | |
9647 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9648 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9649 | /* | |
9650 | * reshape is happening in the remote node, we need to | |
9651 | * update reshape_position and call start_reshape. | |
9652 | */ | |
ed4d0a4e | 9653 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9654 | if (mddev->pers->update_reshape_pos) |
9655 | mddev->pers->update_reshape_pos(mddev); | |
9656 | if (mddev->pers->start_reshape) | |
9657 | mddev->pers->start_reshape(mddev); | |
9658 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9659 | mddev->reshape_position != MaxSector && | |
9660 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9661 | /* reshape is just done in another node. */ | |
9662 | mddev->reshape_position = MaxSector; | |
9663 | if (mddev->pers->update_reshape_pos) | |
9664 | mddev->pers->update_reshape_pos(mddev); | |
9665 | } | |
9666 | ||
70bcecdb GR |
9667 | /* Finally set the event to be up to date */ |
9668 | mddev->events = le64_to_cpu(sb->events); | |
9669 | } | |
9670 | ||
9671 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9672 | { | |
9673 | int err; | |
9674 | struct page *swapout = rdev->sb_page; | |
9675 | struct mdp_superblock_1 *sb; | |
9676 | ||
9677 | /* Store the sb page of the rdev in the swapout temporary | |
9678 | * variable in case we err in the future | |
9679 | */ | |
9680 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9681 | err = alloc_disk_sb(rdev); |
9682 | if (err == 0) { | |
9683 | ClearPageUptodate(rdev->sb_page); | |
9684 | rdev->sb_loaded = 0; | |
9685 | err = super_types[mddev->major_version]. | |
9686 | load_super(rdev, NULL, mddev->minor_version); | |
9687 | } | |
70bcecdb GR |
9688 | if (err < 0) { |
9689 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9690 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9691 | if (rdev->sb_page) |
9692 | put_page(rdev->sb_page); | |
70bcecdb GR |
9693 | rdev->sb_page = swapout; |
9694 | rdev->sb_loaded = 1; | |
9695 | return err; | |
1d7e3e96 GR |
9696 | } |
9697 | ||
70bcecdb GR |
9698 | sb = page_address(rdev->sb_page); |
9699 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9700 | * is not set | |
9701 | */ | |
9702 | ||
9703 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9704 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9705 | ||
9706 | /* The other node finished recovery, call spare_active to set | |
9707 | * device In_sync and mddev->degraded | |
9708 | */ | |
9709 | if (rdev->recovery_offset == MaxSector && | |
9710 | !test_bit(In_sync, &rdev->flags) && | |
9711 | mddev->pers->spare_active(mddev)) | |
e1a86dbb | 9712 | sysfs_notify_dirent_safe(mddev->sysfs_degraded); |
70bcecdb GR |
9713 | |
9714 | put_page(swapout); | |
9715 | return 0; | |
9716 | } | |
9717 | ||
9718 | void md_reload_sb(struct mddev *mddev, int nr) | |
9719 | { | |
9720 | struct md_rdev *rdev; | |
9721 | int err; | |
9722 | ||
9723 | /* Find the rdev */ | |
9724 | rdev_for_each_rcu(rdev, mddev) { | |
9725 | if (rdev->desc_nr == nr) | |
9726 | break; | |
9727 | } | |
9728 | ||
9729 | if (!rdev || rdev->desc_nr != nr) { | |
9730 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9731 | return; | |
9732 | } | |
9733 | ||
9734 | err = read_rdev(mddev, rdev); | |
9735 | if (err < 0) | |
9736 | return; | |
9737 | ||
9738 | check_sb_changes(mddev, rdev); | |
9739 | ||
9740 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9741 | rdev_for_each_rcu(rdev, mddev) { |
9742 | if (!test_bit(Faulty, &rdev->flags)) | |
9743 | read_rdev(mddev, rdev); | |
9744 | } | |
1d7e3e96 GR |
9745 | } |
9746 | EXPORT_SYMBOL(md_reload_sb); | |
9747 | ||
1da177e4 LT |
9748 | #ifndef MODULE |
9749 | ||
9750 | /* | |
9751 | * Searches all registered partitions for autorun RAID arrays | |
9752 | * at boot time. | |
9753 | */ | |
4d936ec1 | 9754 | |
5b1f5bc3 | 9755 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9756 | static LIST_HEAD(all_detected_devices); |
9757 | struct detected_devices_node { | |
9758 | struct list_head list; | |
9759 | dev_t dev; | |
9760 | }; | |
1da177e4 LT |
9761 | |
9762 | void md_autodetect_dev(dev_t dev) | |
9763 | { | |
4d936ec1 ME |
9764 | struct detected_devices_node *node_detected_dev; |
9765 | ||
9766 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9767 | if (node_detected_dev) { | |
9768 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9769 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9770 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9771 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9772 | } |
1da177e4 LT |
9773 | } |
9774 | ||
1da177e4 LT |
9775 | static void autostart_arrays(int part) |
9776 | { | |
3cb03002 | 9777 | struct md_rdev *rdev; |
4d936ec1 ME |
9778 | struct detected_devices_node *node_detected_dev; |
9779 | dev_t dev; | |
9780 | int i_scanned, i_passed; | |
1da177e4 | 9781 | |
4d936ec1 ME |
9782 | i_scanned = 0; |
9783 | i_passed = 0; | |
1da177e4 | 9784 | |
9d48739e | 9785 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9786 | |
5b1f5bc3 | 9787 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9788 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9789 | i_scanned++; | |
9790 | node_detected_dev = list_entry(all_detected_devices.next, | |
9791 | struct detected_devices_node, list); | |
9792 | list_del(&node_detected_dev->list); | |
9793 | dev = node_detected_dev->dev; | |
9794 | kfree(node_detected_dev); | |
90bcf133 | 9795 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9796 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9797 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9798 | if (IS_ERR(rdev)) |
9799 | continue; | |
9800 | ||
403df478 | 9801 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9802 | continue; |
403df478 | 9803 | |
d0fae18f | 9804 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9805 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9806 | i_passed++; |
1da177e4 | 9807 | } |
5b1f5bc3 | 9808 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9809 | |
9d48739e | 9810 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9811 | |
9812 | autorun_devices(part); | |
9813 | } | |
9814 | ||
fdee8ae4 | 9815 | #endif /* !MODULE */ |
1da177e4 LT |
9816 | |
9817 | static __exit void md_exit(void) | |
9818 | { | |
fd01b88c | 9819 | struct mddev *mddev; |
1da177e4 | 9820 | struct list_head *tmp; |
e2f23b60 | 9821 | int delay = 1; |
8ab5e4c1 | 9822 | |
af5628f0 | 9823 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9824 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9825 | |
3dbd8c2e | 9826 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9827 | unregister_blkdev(mdp_major, "mdp"); |
9828 | unregister_reboot_notifier(&md_notifier); | |
9829 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9830 | |
9831 | /* We cannot unload the modules while some process is | |
9832 | * waiting for us in select() or poll() - wake them up | |
9833 | */ | |
9834 | md_unloading = 1; | |
9835 | while (waitqueue_active(&md_event_waiters)) { | |
9836 | /* not safe to leave yet */ | |
9837 | wake_up(&md_event_waiters); | |
9838 | msleep(delay); | |
9839 | delay += delay; | |
9840 | } | |
1da177e4 | 9841 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9842 | |
29ac4aa3 | 9843 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9844 | export_array(mddev); |
9356863c | 9845 | mddev->ctime = 0; |
d3374825 | 9846 | mddev->hold_active = 0; |
9356863c N |
9847 | /* |
9848 | * for_each_mddev() will call mddev_put() at the end of each | |
9849 | * iteration. As the mddev is now fully clear, this will | |
9850 | * schedule the mddev for destruction by a workqueue, and the | |
9851 | * destroy_workqueue() below will wait for that to complete. | |
9852 | */ | |
1da177e4 | 9853 | } |
cc1ffe61 | 9854 | destroy_workqueue(md_rdev_misc_wq); |
e804ac78 TH |
9855 | destroy_workqueue(md_misc_wq); |
9856 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9857 | } |
9858 | ||
685784aa | 9859 | subsys_initcall(md_init); |
1da177e4 LT |
9860 | module_exit(md_exit) |
9861 | ||
e4dca7b7 | 9862 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e | 9863 | { |
3f99980c | 9864 | return sprintf(buffer, "%d\n", start_readonly); |
f91de92e | 9865 | } |
e4dca7b7 | 9866 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9867 | { |
4c9309c0 | 9868 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9869 | } |
9870 | ||
80ca3a44 N |
9871 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9872 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9873 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9874 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9875 | |
1da177e4 | 9876 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9877 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9878 | MODULE_ALIAS("md"); |
72008652 | 9879 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |